One possible plot could be Percy's struggle with his new identity as the adopted son of Zeus. He might face envy from other demigods who don't understand why he was chosen. He could also have to deal with Zeus' overbearing nature as he tries to train Percy in godly powers. And there would likely be new quests that involve both his ties to Poseidon and his new relation to Zeus.
The plot might revolve around Percy having to prove himself worthy of being Zeus' adopted son. Maybe there are challenges set by the gods, like facing powerful monsters that only someone with a connection to Zeus could defeat. He could also be caught in a power struggle between the different cabins at Camp Half - Blood due to his new status.
Well, in this fanfiction, perhaps Percy discovers secrets about Zeus that no one else knows as his adopted son. This knowledge could put him in danger from other gods who want to keep those secrets buried. He might also form an unlikely alliance with some of Zeus' enemies who see him as a way to get to Zeus. And throughout all this, Percy is still trying to figure out his place among his friends and the demigod community.
Hera could be a main antagonist. Since she's often jealous and protective of Zeus, she might not be happy with Percy being adopted. She could try to undermine him at every turn. Another could be Ares. He might see Percy as a threat, especially if Percy starts to gain more power as Zeus' adopted son.
One possible plot could be Percy discovering his new parentage of being the son of Zeus and Hera. He might struggle with the new identity as it goes against what he previously knew. For example, he could face challenges from the other demigods who are suspicious or jealous of his new status. He then has to prove himself worthy of this new heritage while also dealing with the complex politics among the gods.
Well, one possible plot could be Percy struggling to adapt to his new 'mother' Khione. He might have to deal with her cold and often unfeeling nature. For example, she could be trying to train him in her own ways which are very different from what he's used to at Camp Half - Blood. Maybe she wants him to use his powers in a more aggressive way to serve her own purposes.
Well, it could be about Percy having to deal with the powers and heritage that come with being the adopted son of Pontus. Maybe he discovers new underwater abilities that are different from his Poseidon - given powers. He might also have to face enemies who are after the secrets Pontus has.
Well, it could be about Percy having to adapt to his new divine family. Maybe he has to learn special water - related powers from Amphitrite that are different from what he already knows. He could also face challenges from other sea deities who are jealous of his new status.
Perhaps the story could be about Percy facing discrimination from other demigods due to his new relation to Pluto. He is then forced to prove himself not only as a hero but also as a worthy adopted son of Pluto. He trains hard to master the powers and knowledge that come with his new status. He also tries to find a way to use his underworld - related abilities for the good of all demigods, like using his connection to the dead to get information about future threats to the demigod world.
Well, one possible plot could be Percy struggling to adapt to his new status as Apollo's adopted son. He might have to learn new powers related to the sun god. For example, he could start to have an affinity for healing, which is one of Apollo's main domains. And he would face challenges from other demigods who are jealous or suspicious of his newfound connection to a major god.
Well, one possible plot could be that Percy, as the adopted son of Hermes, discovers new powers related to speed and trickery. He might use these powers to outwit the monsters that come after him. Maybe he gets involved in a quest where his Hermes - like abilities are crucial in stealing a powerful artifact from a well - guarded enemy stronghold.
Well, it could be about Percy's new powers he gets from being adopted by Hydros. Maybe he can control water in ways he never could before, like creating huge tidal waves at will. And he might have to face some new enemies who are after his new status.
One possible plot twist could be Percy's struggle with his new identity. Since Zeus is the king of the gods, Percy might face a lot of envy and even threats from other demigods or minor gods who see him as having an unfair advantage. Another twist could be Percy's relationship with his old friends at Camp Half - Blood. They might feel betrayed or confused as to why Percy has been adopted by Zeus instead of Poseidon.