Another idea is that Percy discovers a new power within him due to his unique parentage. This power could be something that neither Poseidon nor Athena expected. As he tries to understand and control this power, he gets caught in a conflict between different forces in the mythological world. He has to decide how to use this power for good, while also dealing with the fact that some might see him as a threat because of it.
The plot might involve Percy trying to bring peace between Poseidon and Athena. There could be some ancient feud between them that Percy is determined to end. He could start by finding common ground between the two deities in their respective domains, like the sea and wisdom. Along the way, he would face many obstacles, including other gods and goddesses who don't want the peace to happen.
One possible plot could be a story of cooperation. Maybe there is a great threat to the world of the Greek gods, and Athena, with her wisdom, and Poseidon, with his power over the sea, have to work together. They could start off distrusting each other due to their past rivalries, like the competition for Athens. But as they face challenges, they gradually learn to respect and rely on one another's strengths.
One possibility could be a story where Percy and Artemis have to team up for a quest. Maybe there's a new threat to the world of the gods and their combined powers are needed. Percy's skills as a son of Poseidon in controlling water and Artemis's archery and connection with the moon could be crucial in defeating this new evil.
One possible plot could be Percy's struggle to balance his two powerful heritages. He might face challenges from both the forces of Chaos and the underwater world of Poseidon. For example, the denizens of the deep might be wary of his Chaos side, seeing it as a threat to their ordered underwater society. Meanwhile, the chaotic entities could try to pull him fully into their realm, away from his connection to Poseidon.
A great plot could be Percy getting caught in a power struggle between Athena and Poseidon's followers. Since he is the son of both, he is a symbol of unity or a threat, depending on how different groups view him. He could be forced to prove his loyalty to both sides while also trying to maintain peace among them. This could involve battles, political intrigue, and lots of character development as he tries to figure out where he truly belongs in this complex world of gods and their followers.
The plot might involve a power struggle too. Since Poseidon and Athena both have their own domains and powers. In the fanfic, their love could be a way to combine their powers or it could be something that threatens the balance of power among the gods. For example, other gods might sense the change in their relationship and try to use it for their own gain.
Another plot could involve Percy discovering a hidden connection between Poseidon and Athena that was long forgotten. This could lead to a situation where he has to convince the other demigods that this connection is important for the future of the camp. Maybe there are ancient prophecies that only he can understand due to his unique parentage.
One possible plot could be Percy having to deal with the complex relationship between his two divine parents. Since Poseidon and Hera have their own rivalries and power dynamics in Greek mythology. Maybe Percy discovers some long - hidden secret about their relationship that puts him in the middle of a big conflict among the gods. For example, a prophecy might be revealed that Percy is the key to either mending or worsening the relationship between Poseidon and Hera. And he has to make choices that will not only affect his own fate but also the balance of power among the gods.
One possible plot could be Percy discovering his true parentage as the son of Amphitrite. He might struggle with his identity, as he has always known Poseidon as his father. This could lead to a journey of self - discovery where he has to learn about Amphitrite's powers and how they are now a part of him.
One possible plot could be Percy's struggle with his dual heritage. He might be conflicted between the gentle, love - associated nature of Aphrodite and the powerful, tempestuous nature of Poseidon. He could be an outcast among both the children of Aphrodite, who are often more focused on beauty and charm, and the children of Poseidon, who are known for their strength and connection to the sea. This internal struggle could form the basis of a great adventure as he tries to find his place in the world of demigods.
A great plot could revolve around Percy's role in the power dynamics among the gods. As the son of Hera and Poseidon, he has the potential to shift the balance. Some gods might try to use him as a pawn, while others see him as a threat. Percy would then have to navigate this complex political situation among the gods while also dealing with his own personal growth and the challenges that come with being a demigod.