Well, in this kind of fanfiction, Poseidon could replace Percy in his relationships too. He might interact differently with Annabeth. Since he's a god, his approach to their friendship or potential romantic relationship would be very different from Percy's. He could offer her godly knowledge and wisdom in a way Percy couldn't. And with his other friends like Grover, Poseidon would probably be more of a mentor figure, guiding them with his vast experience as a god.
The dynamic between Poseidon and his son, Percy (in the original), would be completely flipped. Instead of a father - son relationship, they would be more like two separate entities with Poseidon now in Percy's role. Poseidon would have to face the same challenges Percy did, but without the advantage of Percy's unique experiences as a demigod growing up.
One possible storyline could be about their journey towards parenthood. Poseidon might be shown as being overprotective of Amphitrite during her pregnancy. He could use his powers to create a safe and comfortable environment for her in the underwater realm. For example, he could make a special grotto filled with magical sea plants that emit a soothing glow and provide healing properties to keep her and the unborn child healthy.
Well, it could be a story full of adventure. Poseidon, being a powerful god, might have to go on a quest to protect Sally and their unborn baby from other forces in the mythological world. Enemies could be jealous of the union or want to use the baby for their own purposes. Sally, on the other hand, could be using her own wits and courage, despite being pregnant, to help Poseidon in their journey.
Well, it could be about Percy seeking advice from Poseidon on how to deal with a new and powerful enemy. Maybe he's facing a threat that only Poseidon's wisdom can help him overcome.
In a fanfiction, Percy could discover a new aspect of his powers that is related to Poseidon's domain but in a way that no one has ever seen before. For instance, he might be able to control not just water but also the weather patterns over the ocean. When Poseidon witnesses this, he is proud of Percy's growth and evolution as a demigod. He then takes Percy on a special journey to an underwater realm that is only accessible to a select few, to further train him.
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.
Well, one reason could be that fanfiction often takes creative liberties that might distort the original relationship between Poseidon and Percy in the official story. It could be that Poseidon is a very complex character in the original, and fanfiction simplifies or misrepresents him in a way that makes it seem like he 'hates' Percy in those fictional interpretations.
Perhaps there's some sort of prophecy involved. In fanfiction, a prophecy could state that either Percy or Poseidon must be defeated for the greater good. This could create a situation where they are forced to fight. Or it could be a matter of pride. Poseidon might feel that Percy has not shown him enough respect as his father, and Percy might feel that Poseidon has not been there for him enough as a father. These pent - up feelings could explode into a fight.
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.