One possible implication is that it could influence how Zeus views the modern world's perception of the mythological characters. If he likes Percy fanfiction, he might be more open to the new interpretations and ideas that fans have about the whole demigod concept.
It could also mean that Zeus might start to interfere more in the fanfiction world. Since he likes it, he might want to see certain storylines develop or prevent others that he doesn't like. This could lead to some interesting crossovers between the mythological world and the fanfiction world.
It could also be about power. Percy might realize that with Zeus out of the way, he can reshape the world of the gods in a more just and fair way. He could believe that Zeus's rule is corrupt and that killing him is the only way to bring about real change.
It's possible that in the fanfiction, Zeus made a deal that put Percy or his loved ones in danger. For instance, Zeus might have made an agreement with an enemy just to maintain his own power, without considering the consequences for Percy and those around him. This would surely make Percy hate Zeus.
It could be that the writer wants to explore the darker side of human nature within the context of these characters. By having Annabeth cheat with Zeus, they can delve into themes like betrayal, jealousy, and the breakdown of relationships. Additionally, some might be doing it as a form of rebellion against the 'perfect' relationship that Annabeth and Percy seem to have in the original, wanting to add a bit of chaos and realism to the fictional world.
It changes the fundamental nature of the character. Naruto is typically a symbol of hope and friendship, so making him like killing makes the story much darker and less inspiring.
One possible plot could be that the entire Greek pantheon is thrown into chaos. Percy might be seen as a huge threat, and other gods and goddesses would either try to hunt him down or form alliances with him out of fear or a desire for power. Demigods would be forced to take sides, leading to massive battles among them.
Fanfiction often takes creative liberties. In this case, it might be that the author wanted to explore new power dynamics and character interactions. If Percy was Zeus' brother, it would completely change the power balance in the world of the series. Percy's connection to the sea and Zeus' control over the sky could lead to all sorts of interesting plotlines, like joint quests or power struggles between the two 'brothers'.
The consequences can be quite significant. For starters, Percy's relationships with his friends could be strained. His friends might be worried about Zeus's influence over him. Percy himself could start to resent Zeus's possessiveness, which might lead to him acting out. In the larger context of the fanfic's world, it could also cause an imbalance in the power dynamics among the gods. If Zeus is too focused on Percy, other important matters in the divine realm could be neglected, leading to chaos.
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.
Yes, there might be. Fanfiction is a vast world, and with the popularity of Percy and the Greek mythology concept, it's quite possible that someone has written a story where Percy is Zeus' mate. You can check popular fanfiction websites like Archive of Our Own or FanFiction.net.
In this kind of fanfiction, Percy might challenge Zeus over issues like the unfair treatment of demigods. For example, Zeus could be overly harsh on demigods who make minor mistakes while the gods themselves get away with much worse. Percy, being a hero, would stand up for his fellow demigods.