CosmoLuz
I am not going to say this is a bad idea, but... its gonna be really hard to incorporate all the pantheons into a single novel, it normally never goes well. i mean like if your a god, who protects and controls the main parts of the planet and life, eg posiedon-sea, athena-wisdom, hestia-home and hearth/fire. if another pantheon has another god who represents the same thing, it kinda demeans the purpose, like if apollo rides the sun chariot across the sky, it means the sun is a chariot. yet if ra is the sun god, then does ra also control appollos chariot, or is it a different sun? (Which obviously wouldnt make sense) Thats why i like to think, when fan fics do ones about gods, that whatever gods they are describing, are the only gods in that world. cus if kronos is making everyone a slave why wouldnt odin/some other god interfere. and if you say he only controls greece, then why would everyone not just leave greece and go to norway or something to another god. Thats why its never a good idea. plus you would have to give the pantheons different strengths, which will be totally annoying. because you would have to decide what their power runs off, if their power runs off faith, the greek gods are gonna be super weak compared to like allah and jesus christ, buddah etc. which wouldnt really be fair, but if you decide to power them off figuritave strength from myths, then zeus and odin who arent all powerful as compared to buddah and allah(i think, i dont really know much about most gods, but im pretty sure zeus and odin arent omnipotent while some others are). so you are never going to get a good balance, plus it would be an idiotic move to make them all the same power. cus then there isnt really going to be much development and it wouldnt make sense. like then if odin is the same strength as all the other leaders of the other pantheons, he can basucally steam roll them all, as most other panethons dont have valkyries and berserker squads(i know there may be angels, but if the valkyries counter the angels, then the berserker squad and the other gods of norse mythology like thor would decimate the rest, as there isnt really any other god in the christain pantheon to counter thor and frigga and baldur etc) so this is mega dumb
If y'all want to read a GOOD Percy Jackson FF with an MC that's reincarnated as Poseidon, read "Reincarnated as Poseidon". I don't know which came first, but they both follow the same plot except for Poseidon (In recommendation) being an actually good MC and also some betrayal things (Not NTR tho) and the grammar is infinitely better in the recommendation...