Well, perhaps Percy goes to Alaska to find a hidden artifact that is crucial for preventing a major disaster. Along the way, he has to deal with the harsh Alaskan weather and make friends with the locals who are initially skeptical of him. He could also face some Alaskan - themed monsters like a giant ice - wolf or something.
One possible plot idea could be Percy encountering unique Alaskan mythical creatures that are different from what he's used to in other places. Maybe he discovers a tribe with a special connection to the gods that he has to help protect.
One idea could be Percy using his unique skills to solve a mystery at school, like a series of strange disappearances in the school basement. Another could be Percy facing a bully who turns out to be a monster in disguise. Or perhaps Percy starting a club at school to teach other students about ancient Greek mythology.
One idea could be Percy getting involved in the vampire - human drama in Forks. Maybe he discovers the secret of the Cullens and tries to find a way to co - exist with them, given his own experiences with different species in his own world.
One idea could be Percy arriving in Beacon Hills and being mistaken for a new supernatural threat. The local pack tries to figure out his powers and intentions. Another could be Percy teaming up with the pack to fight a common enemy that is drawn to the unique energy of Beacon Hills and Percy's own demigod powers. Maybe he also has to adjust to the high school life there while hiding his true identity from most of the students.
One idea could be Percy trying to hide his demigod powers from his high school classmates while still using them to solve normal high school problems like bullying. Another could be Percy forming a secret club in school for other kids with special abilities. Or maybe Percy getting into a friendly rivalry with the school's star athlete in a non - combat - related sport like track and field.
In an Alaska - based Percy Jackson fanfiction, Percy could be on a quest that leads him to the frozen tundra. He might discover an ancient Greek artifact that has been hidden there for centuries. This artifact could hold the key to preventing a major disaster, like the awakening of an old and powerful enemy. Along the way, he could team up with some local Inuit demigods who have their own unique powers and knowledge of the Alaskan wilderness.
Maybe Percy is sent to Russia by the gods as a form of punishment or test. While there, he gets involved in a battle between two ancient Russian magical forces that he has to navigate to survive. Or perhaps he travels to Russia in search of an artifact that can help him in his ongoing fight against the forces of evil back home.
One potential new character could be a scientist, Dr. Thompson, who is studying the strange phenomena in Alaska that are actually related to the magical world Percy is part of. He initially doesn't believe in the magic but as he witnesses Percy's powers, he becomes an ally. There could also be a group of Inuit shamans who have their own powers and traditions. They might initially be wary of Percy but then come to respect him and work together with him to solve a problem that is endangering both the magical and non - magical parts of Alaska.
Perhaps Naruto gets influenced by a dark and ancient power. He starts to see the ninja world as corrupt and decides to reshape it according to his own dark vision. He could form his own army of outcasts and fight against the established ninja villages.
Another plot could be that Harry is mistaken for someone else at Ouran. He then has to navigate through the misunderstandings while also trying to figure out how the Ouran world, with its own set of rules about class, social status, and relationships, compares to his world at Hogwarts. There could be a lot of comical moments as he tries to fit in without revealing his true identity as a wizard.
One idea could be Harry making new friends in Salem who have different magical abilities than those he knew in Hogwarts. Another could be him encountering a unique magical creature native to Salem. Maybe he gets involved in a mystery related to an old Salem witch trial that has some lingering magic.