Madara Uchiha
Arashi was happy that Kushina, Kana and Mikoto were able to understand the level of threat they were facing in the future. Telling them about the Otsutsuki clan and Kaguya made it easier to accept his plans. Rather than experimenting about different clan bloodlines in hiding, he wanted to do it with their help. Who would be a better help than the same clan's member.
While he was deep in his thoughts, Mikoto had another matter that concerned her greatly. Knowing your ancestor was alive, was good thing. But if the ancestor was hell bent on the path that lead to your destruction was another thing all together. She wanted to know more about Madara's plans. But she was hesitating to ask Arashi for more information. Already the amount of information he had revealed, was staggering. Knowing about your clan's history and it's true origin was one thing, but having a feasible way to achieve something that not many would have thought was something else.
She knew, if they were to be successful in finding a way to merge all the six bloodlines and restore it to the level of Otsutsuki clan, would led to a path more glorious than the Sage of Six Paths. They might even be become like their progenitor Kaguya Otsutsuki. That level of power was unimaginable for Mikoto. Even though her father had already unlocked Mangekyo Sharingan, she never had the chance to see its true power for herself. Thinking of a dojutsu capable of putting the inhabitants of the whole shinobi nations into genjutsu and channeling their chakra to yourself was monumental and godlike for young Mikoto.
Gathering her courage she asked "Arashi, do you by any chance know what Madara Uchiha is planning?"
Once the question reached everyone's ear, they began paying more attention to Arashi. Kushina and Kana also wanted to hear his answers.
"It seems I have forgotten to tell you the most important piece of news. Thanks Mikoto for reminding me. Well as far as I know from the memories, Madara is planning something big. In fact his goal is to bring peace to this cursed shinobi world. But his way of bringing peace is somewhat unreasonable.
You may not know but Madara and Hashirama were best friends and rivals. They met each other when they were young. Both of them desired peace. Together they imagined a world where children like themselves wouldn't need to fight. But, Madara and Hashirama did not divulge their family names, but nevertheless discovered each other's identities: Madara was an Uchiha, Hashirama was a Senju; it was their duty to kill each other, even if they were friends. Needing to choose between his family and his dreams of peace, Madara chose to end his friendship with Hashirama so he would have no reservations over killing him in the future, a resolve strong enough to awaken his Sharingan.
Over the following years Madara and Hashirama continued to meet in combat. Madara could never defeat Hashirama even after acquiring a Mangekyo Sharingan and Hashirama could never bring himself to kill someone he still considered a friend, resulting in a constant stalemate between the two that lasted decades. In time, both Madara and Hashirama became leaders of their respective clans, a position Hashirama tried to use to broker peace between them. Although some Uchiha found the offer increasingly tempting, Madara refused due to Izuna's death at the hands of Hashirama's own brother, Tobirama. Despite this, some Uchiha defected over to the Senju clan out of self-preservation. Madara then used Izuna's eyes in order to gain 'Eternal' Mangekyo Sharingan and restore his deteriorating vision. With this new power he waged one final assault against the Senju and was summarily defeated. Rather than kill Madara to bring the era of war to an end, Hashirama offered to kill himself if it would stop the fighting. Madara was moved by Hashirama's gesture and finally assented to peace.
After that you know what happened. The Senju, the Uchiha, and all their affiliated clans came together to found a village of peace, where children would never need to die in battle. Madara and Hashirama, rekindling their childhood friendship, and Madara called that village Konohagakure, seeing it through leaves. But Madara's idea of peace differed from Hashirama's: where Hashirama envisioned cooperation with the other newly-formed villages, Madara desired control so the peace could never be lost, evidenced by his attacking Iwagakure's Mu and Onoki so that they would submit to Konoha's authority. When Hashirama was elected as Hokage, Konoha's leader, Madara also became concerned for the Uchiha's future, believing this to be but the first step in the Senju's dominance.
The Stone Tablet Zetsu altered had been in the Uchiha's possession for generations and was brought with them when they settled in Konoha. Through careful study, Madara was able to decipher enough of it to learn of the history of shinobi: of the endless cycle of failed peace and the destiny of battle between Uchiha and Senju, but also a means of unity for the world. With this knowledge, Madara decided Konoha was a failed experiment. He tried to convince his own clan and even Hashirama of the same conclusion, but none would hear him. Madara chose to abandon the village, attacking Konoha on multiple occasions, later returning with the Nine-Tailed Demon Fox under his control to challenge Hashirama. They fought to exhaustion, and from the carnage of their battle the Valley of the End was formed. In the end, Madara was killed by Hashirama.
News of Madara's death spread fast and his corpse was secretly hidden to keep anyone from finding it and profiting from it. But Madara had planned ahead: he had scheduled an Izanagi to activate sometime after his death, changing reality to bring him back to life in exchange for his right eye's vision. Having expected this, Black Zetsu located Madara's corpse and hid itself inside Madara's body, allowing it to later deceive Madara into thinking he created it. After being revived, he left a copy in place of his real body and went into hiding with a special trophy from his fight with Hashirama: a mouthful of Hashirama's flesh that he transplanted into his wounds. It was not until decades later, towards the end of Madara's natural life, that the cells had any effect, awakening the Rinnegan (in the process restoring his right eye). With the Rinnegan he was able to summon the Demonic Statue of the Outer Path, which he used to cultivate a mindless living clone of Hashirama from which he believed he had produced a White Zetsu Army."
"Over the years, Madara had perfected his plans for peace in what he called the Eye of the Moon Plan. But as his years waned, Madara knew he couldn't complete his plans in the time he had left. So he transplanted his Rinnegan into a young Nagato without the boy's knowing, intending Nagato to someday use the eyes to restore Madara to life. If Nagato was to do this, however, Madara would need an agent to act on his behalf and guide Nagato towards this ultimate goal. Madara waited, connecting himself to Demonic Statue to keep him alive until someone could be found. Madara spent this time keeping a close eye on Konoha to find a suitable pawn to take his place.
During the Third Shinobi World War, Madara found a badly injured Obito Uchiha. Madara used Hashirama's cells to replace Obito's damaged extremities and placed a Forbidden Individual Curse Tag in Obito's heart as a fail-safe in case Obito ever turned against him. Until then, Madara began working towards corrupting Obito. He had Kirigakure kidnap the girl Obito loved, Rin Nohara, and seal the Three-Tails into her. He then manipulated events so that Rin would die at the hand of Obito's friend, Kakashi Hatake, while Obito watched. Driven to despair, Obito offered his services to Madara. Madara divulged to Obito the history of the Sage of the Six Paths and the Ten-Tails, the details of his Eye of the Moon Plan, and various techniques that Obito would need moving forward. As a final act, he left behind Black Zetsu what he believed to be a manifestation of his will to provide additional guidance to Obito in pursuit of this goal. With that, Madara disconnected from the Demonic Statue and, with his dying breath, entrusted Obito with his name: Madara Uchiha.
Obito now known as Tobi, acting under Madara's name, moves into the final stages of the Eye of the Moon Plan by initiating a Fourth Shinobi World War. Before the war's start, Kabuto Yakushi approaches Tobi to try and form an alliance. When Tobi asks what will happen if he refuses, Kabuto resurrects Madara to show he knows that Tobi is not the true Madara and forces him to accept. Tobi reluctantly agrees and Kabuto de-summons Madara.
During the Fourth Shinobi World War, Kabuto decides to use Madara against the Allied Shinobi Forces and uses Mu as a medium to summon him to the battlefield. When he first becomes aware of his surroundings, Madara believes he has been brought back by Nagato's Outer Path Samsara of Heavenly Life Technique but soon realizes that he instead has been brought back with the Impure World Reincarnation. Kabuto speaks through Mu, introduces himself, and explains recent developments in the world and Tobi's current actions. After Kabuto points out that he has restored Madara to a state beyond his prime, Madara tests his body by tearing through the Fourth Division, thinning its numbers. The Fourth Division's initial attempts to stop Madara fail as he protects himself with Susanoo. When the Fifth Kazekage, Third Tsuchikage, and one of Naruto Uzumaki's shadow clones combine efforts, Madara is forced to activate his Rinnegan and absorb the attack.
Realizing his enemies were too dangerous for him to hold back to basic ninjutsu and taijutsu, Madara pulls down a meteorite from the atmosphere. When the Kazekage and Tsuchikage successfully stop it, Madara adds a second meteorite to his attack, both of which fall upon and devastate the Fourth Division. With most of the Fourth Division dead, Madara questions Kabuto about just how far off-plan Tobi has gone. Because Kabuto doesn't actually know much about the plan, Madara is left to check things for himself and tries to summon the Nine-Tails, only to discover it's sealed in a jinchuriki, specifically Naruto. Despite knowing the current Naruto was a clone, he decided to delay his plans to test out his new powers, namely, the Wood Release: Nativity of Trees which Naruto's clone barely countered. He then moves in to finish off the remainder of the Fourth Division but is repelled by the arrival of the Fifth Hokage, the Fifth Mizukage, and the Fourth Raikage. The five Kage combine forces against Madara and propel him from the immediate area.
By the time he returns, Naruto's shadow clone is gone and the five Kage remain his only opponents. They battle for some time, with Madara equaling and besting the Kage's efforts. When he is hit with the Tsuchikage's Dust Release: Detachment of the Primitive World Technique, Madara's armour is torn away, revealing the implant of Hashirama's face on his chest. Madara laments Hashirama's legacy that these Kage have inherited, having been completely unimpressed by their attacks, particularly those of the Hokage, Hashirama's granddaughter. Madara then creates twenty-five copies of himself and has them each activate their Susanoo.
By nightfall, the Kage are still alive and are able to pool their efforts so successfully that he is nearly sealed. Finally impressed by their display, Madara responds by summoning his perfected Susanoo. Before he can use it to kill the Kage, his Susanoo starts to fade and Madara is engulfed in light. Madara realizes that Kabuto has elsewhere released him from the Impure World Reincarnation and his soul is returning to the afterlife. Madara responds by performing the hand seals to rescind the Impure World Reincarnation contract that Kabuto has over him, enabling him to return to his immortal body without further interference from a summoner. Now able to do whatever he likes and bored with the Kage, Madara decides to go find Naruto and reclaim the Nine-Tails. The Kage try to block his escape.
After defeating the five Kage, Madara finds and reunites with Obito while he's engaged in combat with Naruto, Killer B, Kakashi Hatake, and Might Guy. Madara notices the Demonic Statue undergoing a premature transformation into the Ten-Tails and scolds Obito for being too hasty. After Obito returns Madara's gunbai, Madara creates a wood dragon in an attempt to capture Naruto and Killer B and complete the Ten-Tails. He at one point manages to restrain and drain B of his energy but is overwhelmed by Guy's Daytime Tiger. The Ten-Tails is revived before he can recover, forcing Madara to make do. He and Obito leap onto the Ten-Tails' head and connect themselves to it, granting them control of its actions. Their four opponents put up a resistance but are no match for the Ten-Tails' power. Before the Ten-Tails can finish them off, however, the combined Allied Shinobi Forces arrive to join the fight, deflecting the Ten-Tails' attack.
The Allies join forces to immobilize the Ten-Tails, making it an easy target. The Ten-Tails undergoes a new transformation before their attacks can connect, freeing it and letting it block the incoming attacks. Though the immediate problem is solved, Madara realizes there's another issue: the Allies are being coordinated too effectively. He and Obito direct the Ten-Tails to attack the distant Allied HQ, something that takes several Tailed Beast Balls due to their lack of control, which Madara attributes to Obito's failure to revive him correctly. Although the Allies' "brain" is killed, the Allies are given one final battle plan in the time it takes the Ten-Tails to hit its target. Obito and Madara try to thin the Allies' numbers before they can get into position and, when that fails, block against the oncoming attack, but the combined forces manage to break through and separate Obito and Madara from the Ten-Tails. With the Ten-Tails now out of their control they must fight the Alliance directly. Obito eventually disappears to the other dimension, forcing Madara to fend for himself.
During Obito's absence, Madara senses that Hashirama has elsewhere been brought back to life. Excited at the prospect of fighting his rival again, Madara eagerly awaits his arrival. When he arrives, Hashirama sends only a wood clone to face him, being too busy restraining the Ten-Tails. Madara decides to sit out the fight until the real Hashirama is ready. When the wood clone persists, Madara easily defeats it. Madara later senses Obito's return to the battlefield and decides to make use of one of his fail-safes, activating black receivers planted in Obito to force him to finally revive Madara. Obito resists and instead seals the Ten-Tails into himself.
Though he's frustrated by this setback, Hashirama is no longer preoccupied, so Madara forces him into a fight for two reasons: his simple desire to fight his rival once again and he also plans to oppose Obito and take his place as the caster of the Infinite Tsukuyomi. To accomplish the latter however, Madara needs Senjutsu chakra, which Hashirama has. As their battle rages, Hashirama tries to convince Madara to postpone, but Madara repeatedly refuses. Nevertheless, he keeps track of Obito's progress and growing control of the Ten-Tails' power. After Obito's defeat, Madara is restrained by Hashirama's wood dragons and the Alliance moves in to seal him.
With Obito no longer the Ten-Tails' jinchuriki, Madara puts another fail-safe into effect: Black Zetsu. Having been in contact with it since his initial reincarnation, Madara orders Black Zetsu to take control of Obito's body and use the Outer Path - Samsara of Heavenly Life Technique. Restored to life, Madara is able to make use of his modified body's full power, to which he breaks free of his restraints. Having died with his real eyes intact and removed from his body, Madara's reincarnated eyes crumble to nothing. Sasuke attempts to burn Madara with Amaterasu while Naruto reminds Sasuke that Madara can absorb ninjutsu. Madara however, had to discard his armour that was burnt by the flames. To compensate for his blindness, he immobilizes Hashirama with black receivers and absorbs his Senjutsu chakra, enhancing his sensory skills enough to perceive his enemies and their attacks without the need of sight. He is once again attacked by Sasuke, but instructs Sasuke to stay out of his way since he does not want to kill his own clansman.
Madara goes after the freed tailed beasts so that he can revive the Ten-Tails once more. He attempts to take on all nine at once, failing and losing his right arm in the process. While he regroups, a White Zetsu clone brings him one of his Rinnegan that Obito kept in storage. Madara takes this and one of the Zetsu's arms, allowing him start round two. He summons the Demonic Statue from Obito's body and uses Limbo: Border Jail to repel the nine beasts. Before they can recover, he seals all of them into the Demonic Statue, including those sealed in Naruto and B. While the Statue undergoes its transformation into the Ten-Tails again, Madara asks the Zetsu clone how Black Zetsu is faring with taking his remaining Rinnegan back from Obito. Tobirama Senju, having been reincarnated alongside Hashirama, attacks Madara immediately afterwards, but is restrained after failing to deal any damage. Sasuke also attacks Madara but is immobilized in midair. Having already warned Sasuke once, Madara turns Sasuke's own sword against him and stabs him in the chest.
With nobody left to oppose him, Madara seals the Ten-Tails into himself once its resurrection is complete. Pleased with himself, Madara sets off to regain his other Rinnegan. Along the way he spits out the Benihisago and Kohaku no Johei, Obito having used both as part of his premature revival method. When he arrives at Black Zetsu's location, he discovers that Obito has regained control of his body. Madara tries to reason with Obito, reminding him of all they planned and insisting on the impending effectiveness of the Eye of the Moon Plan. Rather than be convinced, Obito stabs Madara and manages to steal fragments of the One-Tail's and Eight-Tails' chakra from him before using Kamui to escape with Naruto.
While Madara contemplates his next move, he is confronted by Might Guy, a master of taijutsu, which is one of the only effective attacks against Madara in his new form. Guy opens all Eight Gates and hits Madara with the Evening Elephant. Madara is taken by surprise and tries to defend himself, but other Allied Shinobi are able to reduce him to a single Truth-Seeking Ball, leaving him wide open. Madara is thrilled at the prospect of such a challenging fight, and visibly battered but not beaten, forcing Guy to use Night Guy. Madara is nearly killed by the attack, which obliterates the entire left side of his body. Thanking Guy for giving him such an entertaining battle, and acknowledging him as a worthy opponent, Madara decides to show him the ultimate respect by killing him instead of letting him succumb to his injuries. However, the Truth-Seeking Ball that Madara launches at Guy is kicked back at him by a revived Naruto, whom Madara notes has somehow gained power similar to his own.
Naruto sends Madara crashing through the recreation of the Ten-Tails in its giant tree form, a remnant of Obito's earlier battle. A voice speaks to Madara, telling him to absorb it. Madara does so and becomes stronger, but is met with a new problem: Sasuke, also healed from his injuries, has joined forces with Naruto and is also in possession of new abilities. Despite Madara's efforts, he can do nothing against them. Knowing he needs his other Rinnegan if he's to end the fight, Madara steals Kakashi Hatake's Mangekyo Sharingan and uses it to go after Obito. He stops Sakura Haruno from destroying the Rinnegan, to which Obito responds by sending her back to the real world before Madara can kill her. However, Obito himself is too weak to fight back.
To give Obito some final words, Madara first congratulates him for removing the Forbidden Individual Curse Tag he had placed on him. He also reveals his role in the death of Rin Nohara, in doing so admitting that he's been manipulating Obito from the start. With that, Madara takes back his Rinnegan, returning to Obito his left Mangekyo Sharingan. Black Zetsu uses Obito's body to perform Kamui and return them to the real world. Naruto and Sasuke move to attack him as soon as Madara appears, so Madara delays them with multiple Chibaku Tensei. Madara gains proximity to the moon, awakening the Rinne Sharingan in the process, and succeeds in casting the Infinite Tsukuyomi.
The entire world is trapped in a dream and then wrapped into Madara's God: Nativity of a World of Trees. Sasuke is able to save Naruto, Kakashi, and Sakura from the Infinite Tsukuyomi. Seeing them, Madara announces himself the world's saviour, one who has saved the world from itself by replacing the hells of reality with the heavens of dreams. While he is proclaiming his victory, Black Zetsu stabs him in the back. Black Zetsu reveals that it is not Madara's will, but Kaguya Otsutsuki's, and that he has taken advantage of him in order to bring about her revival. Black Zetsu transfers from Obito's body to Madara's, completely covering him and forcing him to start absorbing the chakra of those trapped in the Infinite Tsukuyomi. After dramatically increasing in size, Madara shrinks down until a revived Kaguya is revealed in his stead.
Naruto and Sasuke eventually seal Kaguya in her own dimension, along with Black Zetsu, at which point she reverts into the Ten-Tails and spits out Madara. The Sage of the Six Paths summons Madara and everyone else back to the real world, but he can do nothing to save Madara from his approaching death as a result of having both the tailed beasts and Demonic Statue removed from his body. Madara uses his remaining time speaking to Hashirama, noting that his own dream for peace has died while Hashirama's lives on, and therefore was apparently the better of the two. Hashirama replies that they are still friends despite everything, to which Madara agrees as he dies."
At last Arashi explained them how Madara had planned for peace ultimately used for reviving Kaguya. He didn't left any details behind this time because he knew that whatever Madara had planned in the original timeline was bound to change in his timeline due to his interference. He didn't know if Madara was going to wait that long to achieve his goals or he had already found a way to do it himself.
Madara of original timeline had to delay it due to his end of his life. But who knows what this Madara had planned. He was not naive enough to believe that everything would go according to the original timeline.
"All this happened in the future. A future where I was dead along with all of you. I don't know what our action will change the future, but this much is certain that we cannot work as if everything is going to be as same the original timeline. Just me being alive along with my gifts had changed many events. Its best to just use this details as a possibility. This way we can prepare for the best.
Don't expect things to go according to the original timeline. The only reason I explained all this to show you how powerful and dangerous Madara Uchiha can be. With just Uchiha and Senju bloodline he become a unstoppable force. Use this as a motivation to train hard and look for a way to achieve our own goals. If our plan is successful, even if Madara tries to oppose us, he will fail."