Maybe Percy's super strength starts to fade, and he has to go on a quest to regain it. Along the way, he discovers that his strength was not just a gift from Poseidon but also linked to an ancient prophecy. He has to face challenges that test his character and find new ways to be strong without relying solely on his physical power. This could involve making allies with unexpected characters and learning their unique skills.
One idea could be Percy using his super strength to lift an entire island that's about to sink due to some dark magic. This would not only show his physical strength but also his determination to save the people and creatures on it.
One idea could be Percy having to face an ancient and powerful monster that was once sealed away by the gods. His godly strength is put to the test as he discovers new abilities he didn't know he had. Another could be Percy competing in a special Olympics - like event among demigods where his godly strength gives him an edge, but also makes him a target. And perhaps he has to use his strength to save a group of mortals who accidentally wandered into a dangerous demigod territory.
One plot idea could be Percy having to team up with Hera to rescue a group of demigods who have been captured by an ancient monster. Hera, despite her usual aloofness, realizes she needs Percy's unique skills.
One idea could be Percy discovers he has super speed during a battle with a new, extremely fast monster. He uses it to outmaneuver the creature and save his friends.
Perhaps a fanfiction where Percy and Thalia are transported to an alternate dimension. In this new world, they have to figure out how to get back while also dealing with different versions of their friends and enemies. Thalia might have to face an alternate version of herself who has turned evil, and Percy could be the one to help her see the light again. It would be full of action, drama, and self - discovery.
A plot could involve Hera taking Percy on a journey through the past to show him the origins of the gods' power and how it relates to the current problems in the demigod world. This would give Percy a new perspective and knowledge that he can use to save the day. Or perhaps Percy accidentally stumbles upon a secret of Hera's that she's been hiding for centuries, and she has to enlist his help to keep it safe, all while other gods are trying to uncover it too.
Another plot idea could be that Percy discovers a hidden underwater civilization that is not related to Poseidon. This civilization has its own set of rules and powers. Percy has to navigate through their complex society and politics while also trying to convince them to help the demigods in a coming war against an ancient evil that is rising again. The underwater civilization could have unique magic and technology that the demigods have never seen before.
One idea could be that Percy has to face a new threat from Medusa's long - lost sister who has even more powerful petrifying abilities. He has to use his skills and some newfound knowledge about the Gorgon lineage to defeat her.
Perhaps there's a situation where a powerful deity wants to pit Percy and Clarisse against each other in a tournament. But instead of fighting, they decide to work together to outwit the deity. They train in secret, combining their different fighting styles, and in the process, they form an unexpected bond.
One plot idea could be Hera going on a quest with Percy. Since she's a goddess and Percy is a demigod, their dynamic would be really interesting. They could face challenges that test both Hera's divine powers and Percy's wits as a hero. Another idea is a story where Hera loses her memory and Percy has to help her remember who she is while protecting her from other threats in the demigod world. Maybe some monsters would see her in a weakened state as an easy target.
One idea could be Percy discovers a hidden section of the maze that leads to an ancient Greek library filled with forgotten knowledge. This knowledge could help him in his future quests.