Earth's Last Stand

"Oh Daaaabi, I'm home!" Saitama exclaimed as he hopped out of the boom tube, arriving back in the DC Universe on the Dominican beach exactly where he'd departed. "Where are you, buddy? I need you to grab me one of my spare suits."

The sandy shores were empty, save for a passing zombie that fruitlessly began to chase after a group of seagulls. Shrugging, the naked baldy leapt up to his mansion, where he searched the many rooms for his sidekick. Grabbing a spare costume, Saitama tied up his boots as a certain bug began to crawl up his shoulder.

"I accept my defeat, now finish me already!" Cai Sicong demanded, with the immortal cultivator still being stuck in the body of a rhinoceros beetle. "It's dishonoring to be left in this state!"

"Shush, you will be my new talking beetle pet," the villain replied as he straightened up the magenta cape of his dark-grey costume. "But where the heck is Dabi? That guy was supposed to be watching the zombie troops!"

Searching the mansion grounds, the bald clown eventually found the flame villain tied up and gagged within a large, burnt-up crater nearby the jungle.

"Boss, someone was here," Dabi coughed as Saitama ripped the fire-retardant binds off of his sidekick. "Some guy with a size-changing quirk attacked and beat the crap out of me. I tried to torch him of course, but the suit that he was wearing must have been heat-resistant, because he sure shrunk down and knocked me on my ass."

"So I guess the heroes of this world haven't completely given up, eh?" the caped villain asked aloud as he rubbed his bare chin. "Well good, hopefully they can still offer me some strong opponents to fight! Speaking of which, I just had the most amazing battle with this pretty boy in another dimension HAHA!"

"Pretty boy? I could collapse the sun and reduce every living thing to ash with the blink of my eye. I have no equivalent," Cai Sicong piped up from Saitama's shoulder.

"Whoa…what's with the talking bug?" Dabi smirked. "Was this the person that you jumped dimensions for?"

"Yep! I'm going to keep him as a pet for fun!" the caped baldy replied with a nod, before setting the former-immortal aside. "So where is that little guy anyway?"

"Well…I don't know, to be honest," the flame villain answered, before looking off into one of the distant jungles. "I think he went that way, and whatever he was doing I'm sure he had help as well."

The pair explored the island for a bit, where they attempted to hunt down the supposed intruders. Traversing the dense jungle, they passed several zombies that were wandering around aimlessly, before a glinting object amongst the foliage caught Saitama's attention. Approaching it, the duo found a large, metal, blinking object that was covered in fires, lights, and a radio antennae protruding from the top.

"Was this already here?" Dabi asked as he inspected the odd device.

"No idea, but it looks brand new," the one punch man replied as he poked at the object. "Say…it's kind of beeping, just like an alarm clock!"

"Beeping?" His sidekick pondered. "You don't think it's a bomb…do you?"

"Well, let's find out!" Saitama said through an evil grin as he grasped the metallic sides of the device with both hands, before ripping it from the ground.

Dabi watched as the caped baldy next jumped high into the air, soaring off far into the distance while holding the large object over his head. The ocean speeding away beneath his boots, Saitama's eyes searched out for a high-populated area, where upon seeing the glint of a prominent city under the waning sunlight, he promptly threw the beeping device straight at it.

Breaking the sound barrier, it flew towards the city like a cruise missile. Still gaining altitude as his super-jump reached its apex, the bald villain continued watching the foreign item as it careened into a distant skyscraper. Almost immediately, a blinding light enveloped a good chunk of the city, before a spreading shockwave obliterated the remnants as it vanquished everything in its path. A bubble of thick, grey smoke rose to the heavens as a thunderous, ear-shattering boom echoed for thousands of miles, while a mushroom cloud soon formed over the fireball that had become of the municipality.

"HAHAH so it was a bomb!" Saitama laughed as he watched the apparent nuke obliterate the city of Miami, taking with it the souls of millions of people. "Well, that solves that I guess! Geez, so they were trying to blow up my island!"

Landing back on American soil as the destruction continued to spread in front of him, the villain promptly did a U-turn and began to run across the surface of the ocean at speeds faster than the Human eye could see. Turning his bald head, Saitama's lips remained in a twisted smile as the mushroom cloud behind him only continued to grow, where it was evident that the explosive used had been designed to obliterate Dominica in its entirety.

Saitama arrived back on his island just in time to watch as Dabi was being flung around by an unseen force.

"Boss, the little guy is back!" the flame villain yelled as he attempted to scorch his invisible opponent with his blue fire, only to be sent flying backwards from a blow to the chest.

Smirking as his eyes found the flea-sized adversary, the caped baldy vanished, before reappearing near his sidekick to snatch the Atom right out of the air.

"Got you!" Saitama teased as he held the pint-sized Human between the thumb and index finger of his left hand. "Wow, buddy, didn't your mama ever tell you to pick on someone your own size? HAHA!"

"Of all the luck, you appeared just in time to get rid of the hydrogen bomb that we left here for your return," Ray Palmer cursed as his red and blue suite held up the giant hand's fingers. "What did you do with it?!"

"Well, a certain city along the beach no longer exists," the villain said through a toothy grin as he applied more pressure to the miniscule hero between his thumb. "Also, spoiler alert: that bomb would have killed my friend here, but I just survived the energy of a supernova being blasted at me so I'm pretty sure I'd have been fine…"

"Cocky bastard, evil like you will never prevail!" the talented scientist replied, before his suit shrunk him down to less than a nanometer, where he promptly flew out from the bald clown's hand and blasted off away from the island as quickly as possible.

Shrugging, Saitama watched the direction that the tiny man had flown in, where he promptly threw a volley of consecutive normal punches into the air over the ocean.

"O'Brian, you might be our last hope of stopping him right now!" Atom yelled into his suit's communicator. "The fate of the world is-"

Ray didn't have time to finish his sentence as he was caught and obliterated in the barrage of punches despite his invisible size, where he was reduced to a tiny, nanometer splat of blood.

High above Dominica in the bay of a large cargo plane, another superhero threw on some sunglasses as he prepared to drop in over the island, parachute not included.