There could be new challenges waiting for him at the camp. Maybe a new prophecy that involves him and he has to quickly get back into the action of training and preparing. He might also find some changes in the camp, like new cabins or new campers who look up to him.
There's also a chance that it could be Chiron. As the activities director at Camp Half - Blood, he has a special connection with Percy. Chiron would be glad to see Percy back and would greet him in a more formal but warm way, maybe with some words of wisdom and a pat on the back.
One possible reason could be a dark turn in his character. Maybe he's been corrupted by some external force like a powerful and evil magic. Another reason might be a misunderstanding. For example, he believes the camp has betrayed him in some way, so he lashes out in anger.
One reason could be that he doesn't like how the fanfiction writers change the storylines. For instance, they might create romantic relationships for him that he doesn't approve of. It's like his own story is being rewritten without his consent.
The betrayal of Percy by Camp Half - Blood in fanfiction can also be a way to show Percy's growth and resilience. He has to face the ones he considered family turning against him. This can lead to some really interesting character development arcs, where Percy has to re - evaluate his loyalties and find new allies or even learn to rely more on his own strength.
In fanfiction, if Percy hurts Flash, it could be due to Flash's constant bullying. Percy, being a demigod, has powers and a short temper at times. Flash might push him too far, and Percy could accidentally use his powers, like controlling water to trip Flash or something. It would be a moment of self - defense for Percy, and it could lead to a lot of drama in the Camp Half - Blood setting, with other campers having to take sides or deal with the consequences of such an incident.
Well, he might face new monsters. For example, some ancient and more powerful versions of the ones he's already fought. Maybe there are new quests waiting for him at the camp, like finding a lost artifact that has the power to either save or destroy the camp.
One idea could be a story about Percy's sister who was hidden away and discovers her true identity when she arrives at Camp Half - Blood. Another could be a time - travel fanfic where Percy goes back to the early days of the camp and has to deal with different versions of the gods. Or perhaps a story where Percy and his friends have to face a new, unknown monster that is immune to water, which really challenges Percy's powers.
One interesting plotline could be Percy and Annabeth going on a quest outside of Camp Half - Blood to find a long - lost artifact that has the power to protect the camp from a new, unknown threat. Another could be them having to deal with a rift within the camp that divides the demigods, and they have to work together to reunite everyone. And there could also be a plotline where they time - travel back to the early days of the camp to prevent a disaster that could change the future of the camp forever.
Maybe he hates it because it often misrepresents the real Camp Half - Blood or his friends. Fanfictions sometimes take wild liberties with the characters and settings, and Percy might not like how his world is being distorted.
One common theme is the struggle between power and morality. Percy often has to deal with Hades' power and the moral implications of interacting with him in the Camp Half - Blood. Another theme is friendship and loyalty. Despite Hades' reputation, Percy might show loyalty to him in some fanfics. And the theme of self - discovery is also there. Percy could learn more about himself through his experiences with Hades in the camp.