In a more complex plot, Percy could be forced into a boxing match by a powerful enemy who wants to humiliate him. But Percy turns it into an opportunity to unite the demigods. He uses the boxing ring as a platform to give inspiring speeches between rounds. And as the matches progress, he gradually gains the respect of both his allies and former foes through his tenacity and skill in the ring.
One possible plot could be that the entire Greek pantheon is thrown into chaos. Percy might be seen as a huge threat, and other gods and goddesses would either try to hunt him down or form alliances with him out of fear or a desire for power. Demigods would be forced to take sides, leading to massive battles among them.
One possible plot could be Percy waking up one day and finding himself back at the start of his journey at Camp Half - Blood, but with all his memories intact. He could then use this knowledge to avoid the mistakes he made before, like getting in unnecessary fights with some of the other campers. He might also try to befriend some characters earlier who he didn't get to know well in the original story.
Well, he might disappear because of a powerful curse from an ancient enemy. Maybe he gets trapped in a different dimension. When he returns, he could have new powers or knowledge. For example, he might have learned some secret magic from the other dimension that helps him defeat a new threat in the Percy Jackson world.
One possible plot could be that Percy is tricked into a deadly situation by a new villain who has the power to manipulate the elements. Percy is killed in a massive explosion. But his love for Annabeth and his loyalty to his friends are so strong that his soul doesn't pass on. Annabeth, using her intelligence and her knowledge of ancient magic, figures out a way to reach Percy in the in - between world. With the help of some friendly spirits, she brings Percy back to life, and they then set out to defeat the villain who caused his death.
Another plot could be that there is a rift between the worlds of angels and demigods that is causing chaos. Archangel Gabriel is tasked with closing the rift, but he needs Percy's help as Percy has a unique connection to the elements. Along the way, they face challenges from both sides who don't want the rift to be closed, and they have to fight against all odds to restore order.
Well, perhaps he could die sacrificing himself to save his friends from some ultimate evil. Then, his rebirth could be linked to a powerful ancient magic. Maybe a forgotten god decides to bring him back for some grand purpose, like to stop a new threat emerging in the world of the gods.
One possible plot could be Percy going on a solo quest specifically designed to help him master his powers. He might face challenges that force him to use his water - based powers in new and extreme ways, like having to freeze an entire lake to stop a monster from escaping. Along the way, he could meet a new mentor, perhaps an ancient water spirit, who teaches him secrets about his abilities that he never knew before.
Well, perhaps in the fanfiction, the dragon rider is betrayed when they are blamed for a crime they didn't commit. Maybe it was a theft of a powerful magical item. The real culprit sets up the dragon rider, and Percy, believing the false evidence, turns his back on the rider. The rider then discovers the real thief's identity and has to fight against both the false accusations and the real villain to clear their name and reconcile with Percy.
One possible plot could be that the Naruto, who has somehow become a 'God of Lust' in this fanfic universe, crosses paths with Percy Jackson. Maybe Naruto's newfound powers of lust disrupt the balance in Percy's world. Percy then has to figure out a way to either control Naruto or send him back to his own dimension.
Well, one possibility could be that Percy discovers a new aspect of the mythological world. Maybe in this fanfic, his death is a sacrifice to save his friends. Once in Valhalla, he could meet new heroes from different mythologies and form alliances or rivalries. He might also try to find a way back to life or to his friends in the world he left behind.