A prevalent theme is that of second chances. In these fanfictions, Percy's reincarnation represents a new opportunity for him. He can face old foes in a new way or form new alliances. There's also often the theme of mystery. For example, the reason for his reincarnation might be a mystery that he has to solve. And the theme of growth is also there. He grows not only in power but also in wisdom and understanding as he goes through his new life.
In this type of fanfiction, it might be that Naruto's reincarnation is part of a prophecy. Just like in the original Naruto series, there could be a grand plan. His reincarnation could be the key to saving the demigod world from a new, powerful threat. His chakra control could be related to how he wields his new powers in the Percy Jackson realm.
One common theme is identity. Since Percy is reincarnated in a different setting, he often has to figure out who he is in this new life. Another theme is adaptation. He has to adapt to new rules, powers, and cultures in the crossover world. For example, if he's reincarnated into a world with different magic systems, he has to learn how to use them.
The gods would likely be very interested and a bit apprehensive. Zeus, for example, would be worried about Percy's new power disrupting the order of things. Athena might try to use her wisdom to figure out how to control or guide Percy in using his void powers. Poseidon would be conflicted, proud of his son's power but also concerned about how it will affect Percy's future and his relationship with the other gods and demigods.
His relationship with Annabeth would be really interesting. If Percy is reincarnated as Theseus, he might be more headstrong in his decision - making, which could cause some friction with Annabeth who is used to the normal Percy. For example, in planning a mission, Percy (as Theseus) might make a bold move without consulting her first.
One great example could be 'A New Beginning for Fem Percy'. It explores how a female Percy is reincarnated into a different world and has to adapt to new powers and a whole new set of challenges. Another is 'Fem Percy's Reincarnation Adventure' which focuses on her journey to discover her past life as Percy while dealing with the politics of the new realm she's in.
There is a fanfiction called 'Percy's Reincarnation Adventure'. It starts with Percy dying in the original world and then being reincarnated into a world that is both similar and different. The author does a great job of showing Percy's confusion at first and then his determination to adapt. The story also includes some great character development as Percy learns from his past mistakes and grows in his new life.
Well, one possible plot could be Percy having dreams or visions of Theseus' past life. He might start to show some of Theseus' traits like being a great strategist in battles against monsters. For example, in a fight with a horde of hellhounds, Percy could use Theseus - like tactics to outwit them, like leading them into a maze - like area where he has the upper hand.
A fascinating aspect in these fanfictions can be the way the reincarnation affects the relationships with other characters. Old friends might not recognize the reincarnated person at first, and there could be a slow process of rediscovery. The reincarnated character might also have to deal with the expectations of those who knew their past self, which can create complex and engaging storylines.
Reincarnation can completely change the plot. For instance, if a powerful enemy is reincarnated, they might come back with new strategies or alliances. It could turn the tide of a war that was previously won by the heroes.