A potential plot could be Percy being sent on a special mission by Zeus. This mission might be crucial for the balance of the godly world, and Percy has to prove himself worthy of being Zeus' adopted son. He could face many obstacles and powerful foes during this mission.
Another plot might revolve around Percy's family dynamics. He has to navigate his relationship with Zeus, who is now his adoptive father, as well as his relationship with his original family or friends. There could be conflicts and reconciliations within these relationships.
One possible aspect in this fanfiction could be Percy's struggle with his new identity. As the adopted son of Zeus, he might face challenges in a world where the relationships between gods and their offspring are complex. He could be dealing with the expectations of Zeus, which are likely to be high and different from what he has known before.
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.
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 interesting plot could be the adopted son discovering his own unique powers that are different from the typical demigod powers in the Percy Jackson world. Maybe he has a special connection to an ancient and forgotten god, which leads to all sorts of adventures as he tries to figure out what it means and how to control it.
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.
One interesting plot could be Percy using his water powers in Asgard. Since Asgard has its own unique environment, his powers might interact in unexpected ways with the magical elements there. For example, he could create ice sculptures in the middle of a battle, which not only serve as a defense but also as a distraction to the enemies.
In the fanfiction, Percy's relationship with Zeus may develop gradually. Zeus, being a powerful and often aloof figure, might initially be distant from Percy. But as Percy shows his courage and abilities, Zeus could start to take a closer interest. This might lead to Zeus mentoring Percy in some ways, teaching him about godly powers and responsibilities.
There could be new characters introduced as allies. Maybe a demigod from a far - off camp who has special powers related to the sky, just like Zeus. This demigod could understand Percy's new role on a deeper level and they could team up to face the challenges together. Or perhaps an ancient spirit that was once bound by Zeus but now sees Percy as a way to freedom and in return offers its power and knowledge to Percy.
His personality could change in several ways. For one, he might become more arrogant due to the association with Zeus. However, he could also become more responsible, realizing that he now represents Zeus in a way. He may also grow more distant from his old friends as he has to adapt to his new life among Zeus' domain, which could be full of more formalities and power plays.
One common theme is the struggle for identity. Percy, who is usually associated with Poseidon, now has to come to terms with being the son of Zeus and Hera. Another theme could be power - how he manages and discovers his new powers.