An interesting plot could be that the Marauder's Map reveals a hidden part of Hogwarts that no one knew about before. The characters then embark on a journey to explore this new area, which is filled with ancient magic and dangerous creatures. Another idea is that a new spell is accidentally created that causes chaos in the wizarding world, and the main characters have to find a way to reverse its effects. You could also have a plot where a character from a different magical school visits Hogwarts and challenges the students to a magical duel tournament.
One idea could be a fanfic where the characters play a magical version of 'Truth or Dare' that has real consequences in the wizarding world. Another is a plot where a group of students create their own secret society within Hogwarts, with its own set of rules and magic. Or perhaps a story where a character gets trapped in a magical time loop at Hogwarts and has to figure out how to break free while dealing with different challenges each time the loop repeats.
One idea could be creating a fanfic where the player character is a new student who discovers a hidden magical ability that has been lost for centuries. This ability could attract the attention of both good and bad forces within the wizarding world.
One idea could be that the characters gain experience points for every magical feat they achieve, like when Harry masters a new spell, he gets points to level up his magical abilities. Another could be that Hogwarts is turned into a game arena where different houses compete in magical challenges with real - world rewards within the game world.
One idea could be that the characters play the Game of Life in a magical version of the game. For example, instead of normal jobs, they have wizarding careers like Auror or Potions Master. Another could be that the choices in the game have real - world consequences in the wizarding world, like choosing a certain path leading to new spells or magical abilities. And perhaps the characters' relationships are affected by the game, such as friends becoming rivals based on game moves.
One idea could be creating a new magical game within the Hogwarts world. For example, a game that combines elements of Quidditch and wizard dueling. The characters could form teams and compete in a tournament where they have to both fly on brooms and use spells against each other. This would add a new and exciting dynamic to the fanfic.
One idea could be creating a fanfiction where the characters from the game have to face a new, mysterious dark wizard who has the power to manipulate time in Hogwarts. This would lead to all sorts of chaos as they try to restore the normal flow of time and prevent the wizard from changing the past to gain more power.
Some interesting fanfic ideas could involve the wizards from 'Harry Potter' trying to prevent the events of 'Game of Thrones' from happening. Maybe they see the future of Westeros through some form of divination and decide to interfere. Another idea is a character from 'Game of Thrones' somehow traveling to Hogwarts and learning magic, then bringing that knowledge back to Westeros to change the power dynamics. And a fanfic could explore what would happen if the Deathly Hallows were in the 'Game of Thrones' world. Would they be coveted by the various lords and queens? How would the power of the Elder Wand, Resurrection Stone and Invisibility Cloak affect the already complex world of Westeros?
One idea could be Harry Potter arriving in Skyrim and using his magic to combat the dragons. Maybe he teams up with the local mages and they learn from each other's magical techniques.
One idea could be exploring what would happen if a new, mysterious student joined Hogwarts during the Triwizard Tournament. This student could have a hidden agenda related to the Dark Arts and start influencing the events of the tournament in unexpected ways.
One interesting plot idea could be Harry's return to Hogwarts as a teacher. He could pass on his unique experiences and knowledge to the new generation of students.
One idea could be a dragon that forms a bond with Harry and helps him in his battles against Voldemort. Maybe the dragon has some special powers that are crucial for Harry to win.