A more complex plot could be centered around a love story within the context of the game of the gods. A mortal and a god fall in love, but their relationship is forbidden by the rules of the game. They must then find a way to either change the rules or face the consequences.
One idea could be exploring the backstory of a minor god in the 'king of gods' universe. Maybe they have a secret ambition to overthrow the king of gods and the fanfiction could detail their devious plans and how they gather allies.
Another idea is a love story where Percy falls in love with a minor god or goddess. This could involve them having to keep their relationship a secret from the other gods because it's forbidden. The story could explore the challenges they face in their relationship and how they deal with the jealousy and interference from other deities.
One idea could be Percy having to face a new and powerful enemy that even the other gods are afraid of. He has to use his unique skills and connections to defeat it.
One plot idea could be Fem Percy having to prove herself to the gods in a series of trials. Since she's female in this version, she might face different expectations and prejudices from the male - dominated pantheon. Another idea is a love story between Fem Percy and a god, like Apollo perhaps, and how their relationship is complicated by the power dynamics between mortals and immortals.
One idea could be Percy going on a quest to find a lost artifact that has the power to control the weather in the Olympian realm. This would put him in conflict with some of the gods who want to use it for their own purposes.
Well, perhaps Percy could use his knowledge of the gods' weaknesses to his advantage in the pranks. Like, knowing that Zeus is afraid of being overthrown, Percy could stage a fake 'demigod uprising' just to see Zeus's reaction. Or he could play a prank on Aphrodite by making all the statues in her temple look like really ugly versions of her. This would surely get a big reaction from the goddess of beauty.
Well, you could have a crossover where the Gods of Egypt cross into a world of pirates. Ra could be seen as a powerful figure on the high seas, with his sun - like powers being both a blessing and a curse. His light could guide ships or burn them. Another idea is a crossover with a world of fairytales. The gods might interact with characters like Cinderella or Snow White. They could use their powers to change the course of the fairytales. For instance, Anubis could offer Cinderella a different kind of 'happily ever after' that involves the afterlife. Or, a crossover with a world of ancient Rome. The Egyptian gods would face off against the Roman gods, which would be a clash of two powerful pantheons with similar yet different beliefs and powers.
A plot could revolve around a prophecy that foretells the end of the war only if a human sacrifices themselves in a certain way. This would create a moral dilemma for the humans as they would have to decide if one life is worth ending the war. Meanwhile, the gods might be trying to either prevent or encourage this sacrifice depending on their motives in the war. And what if there are traitors among both the gods and the men? This could add an extra layer of mystery and intrigue to the fanfiction.
One idea could be a wizard from a forgotten lineage emerging to challenge the established order in the wizarding world. Maybe he discovers an ancient magic that was thought to be lost.
One idea could be a new challenger arriving in the game world. This character has a unique power that no one has seen before. They start from the bottom but quickly rise through the ranks, making friends and enemies along the way.