Well, an interesting plot for Harry Potter alternate dimension fanfiction might be that the magic in the alternate dimension works completely differently. For example, instead of using wands, witches and wizards use their minds directly to cast spells, but it requires much more concentration. Also, the houses at Hogwarts could have different characteristics. Say, Gryffindor is known for its wisdom rather than its courage in this dimension. And maybe there's a new threat that doesn't exist in the original Harry Potter world, like a strange magical disease that is slowly draining the magic out of all wizards.
One idea could be that in the alternate dimension, Voldemort won the war and Hogwarts is now a dark and dreary place where students are taught only dark magic. Another could be that the wizarding world is merged with the Muggle world in a strange way, like there are magical creatures running amok in London streets. Or perhaps in this alternate dimension, Harry was sorted into Slytherin and has to deal with a whole different set of challenges and prejudices.
One idea could be that in the alternate dimension, Voldemort won the war long ago. Hogwarts is now a dark and dreary place, with Death Eaters as teachers. Harry and his friends, who are part of an underground resistance, have to find a way to travel back in time to change the course of history.
Well, a cool plot for 'Harry Potter in Another Dimension' fanfic could be that Harry discovers he has a twin in this other dimension. His twin has been raised by Voldemort and has a very different view of the wizarding world. Harry has to find a way to convince his twin to abandon Voldemort's ways. Or, what if in this dimension, the Sorting Hat can talk out loud all the time and gives very different sorting decisions? For example, it might put all the brave students in Slytherin and the cunning ones in Gryffindor. It would be really interesting to explore how the relationships between the houses change.
A really cool plot could be that the traveler goes to a dimension where magic is fading away. They discover that it's because of an ancient curse. So, they embark on a journey to find the origin of the curse and a way to break it, all while interacting with alternate versions of the well - known Harry Potter characters.
Well, perhaps in some 'Harry Potter dimension jumper fanfiction', there's a dimension where the Marauders are still alive and they team up with the modern characters to fight a new dark threat. Or a dimension where magic is dying out and the jumper has to find the source of the problem and fix it. This could involve traveling to different magical locations in that dimension, like the Forbidden Forest which might hold some secrets.
One interesting plot could be if Harry was sorted into Slytherin instead of Gryffindor. It would completely change his relationships and how he's perceived. He might have to deal with the prejudices of his own house while also trying to figure out his role in the fight against Voldemort.
One idea could be that Peter discovers he has superpowers unique to this alternate dimension. For example, he might be able to control time in a different way than in his own world. Another plot could involve Peter meeting alternate versions of his friends and family, and having to deal with the differences in their personalities and relationships. Maybe in this dimension, his best friend is his enemy, and he has to figure out how to change that.
Another interesting aspect could be that in his personal dimension, Harry has a different set of friends. He might meet some students from other wizarding schools who are also in their own personal dimensions, and together they form a unique magical community.
One idea could be that in the alternate dimension, the Batfam members have swapped personalities. For example, Batman is overly optimistic and carefree while Robin is brooding and serious. Another plot could involve an alternate Gotham where the city is a utopia, but the Batfam has to deal with a new kind of threat that thrives in this perfect environment. Maybe a villain who wants to bring chaos to this idyllic Gotham.
One interesting idea could be that Harry decides not to destroy the Horcruxes but instead finds a way to redeem Voldemort. Maybe he discovers some long - lost magic that can purify the dark parts of Voldemort's soul. Another idea might be that Hermione becomes the true hero who finally defeats Voldemort with her vast knowledge of magic and out - of - the - box thinking. And there could also be a scenario where Ron sacrifices himself in a completely unexpected way to save Harry and the wizarding world, leading to a bittersweet ending.
In 'harry potter alternate school fanfiction', there are often ideas like a school that is floating in the air. This school could have its own set of rules and traditions. For example, students might have to use flying brooms to get from one class to another. Also, some fanfics might explore a school that is hidden deep underground. It could be a place where students study ancient and lost magics that have been forgotten by the wizarding world above. There could also be an alternate school where the students are sorted by their magical abilities rather than their personalities as in Hogwarts.