Well, it could be that Percy has had enough of the gods' constant interference in his life. He's always been their pawn in some way, and now he decides to run. He might go into hiding in the mortal world, using his skills to blend in. Along the way, he could meet other demigods who also feel the same way about the gods and together they form a sort of resistance, trying to make the gods see how their actions are affecting the demigods.
It could be some of the more vengeful gods, like Ares. If Percy has somehow angered him in the past, Ares would be more than happy to hunt him down. Also, the gods' enforcers, such as the minor deities who do their bidding, could be antagonists too. They would be the ones doing the legwork to find Percy while the major gods give orders from Olympus.
One possibility for the 'percy runs away fanfic' is that Percy runs away to protect his loved ones. He realizes that there is a danger approaching and he thinks that by leaving, he can draw the danger away from those he cares about. So he sets off on his own, facing many challenges along the way, and in the process, he might discover new powers or abilities within himself.
Perhaps in the 'Percy Kills the Gods' fanfic, there is a new and extremely powerful enemy that the gods are unable or unwilling to fight effectively. Percy sees this as a sign of their incompetence or callousness. He could gain some new, super - powerful abilities or weapons that give him the confidence to challenge the gods. He might start by targeting the more tyrannical gods first, like Zeus, who has a history of being harsh and unfair.
One possibility is that the gods see Percy and Jason as threats to their power. Maybe they've become too powerful or popular among the demigods. So, the gods plot against them in secret. They could set up a series of seemingly impossible challenges that are actually traps. Eventually, Percy and Jason fall into these traps and are killed. This could lead to chaos among the demigods as they lose two of their most powerful leaders.
One possibility in 'Percy Runs Away Fanfiction' is that Percy runs away because he is being hunted. There could be a powerful enemy after him, and he decides that running away is the best way to keep his loved ones out of danger. So he leaves his home and goes into hiding, maybe in a far - off land or a hidden magical place, and while he's away, he has to learn to survive on his own and also figure out how to defeat the enemy that's chasing him.
Well, one possibility is that the gods who betray Percy might be jealous of his power or popularity among mortals. Maybe they feel threatened by his ability to influence the mortal world in a way they can't control. They could start spreading false rumors about him, turning some of his allies against him.
A really interesting plot would be if Percy lost his memory and ended up in a mortal town. He has to figure out who he is on his own while still being hunted by some old enemies. The gods are aware of his situation but can't interfere directly because of some ancient rule. So Percy has to rely on his instincts and any small clues he can find about his past to get back to his normal self and his life at Camp Half - Blood.
Well, in this 'Percy Flees the Gods Fanfic', perhaps Percy is fleeing because he has discovered some dark secrets about the gods. Maybe he realizes that they are not as noble as they seem, and he doesn't want to be part of their world anymore. It could also be that he is trying to protect his friends and family from the gods' wrath.
Another plot could involve Percy being tricked into taking on the role of king by a devious god who wants to use him as a puppet. Percy then has to figure out how to break free from this god's control and truly claim the throne for himself and for the good of all the demigods and mortals. He could seek the help of the wise centaur Chiron who gives him advice based on ancient knowledge.
One idea could be a story where a new demigod discovers they have the power to communicate with the long - forgotten minor gods and goddesses. This new ability throws the established order at Camp Half - Blood into chaos as they try to figure out if this is a good or bad thing.