One interesting idea could be that Harry decides not to defeat Voldemort in a traditional battle. Instead, he uses a powerful spell of love and redemption to turn Voldemort back to his original self, Tom Riddle, a lost and confused boy. This would completely change the whole dark - vs - light dynamic of the story.
Perhaps in the 'harry potter alternate ending fanfic', Hermione actually becomes the one who sacrifices herself to save everyone. She could use her vast knowledge of magic to create a powerful shield that protects Hogwarts but at the cost of her own life. This would be a huge departure from the original ending and would give Hermione a more heroic and self - sacrificing role.
Another idea might be that the entire wizarding world decides to make peace with the Death Eaters. They realize that the cycle of hatred and violence only leads to more death and destruction. So, through a series of complex negotiations and magical bindings, they find a way to rehabilitate the Death Eaters. Harry would play a key role in this as a symbol of unity and forgiveness.
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.
One idea could be that Harry has an alternate identity as a Muggle detective. He uses his magical skills secretly to solve cases that have a magical element but are disguised in the Muggle world. For example, he might be investigating a series of strange disappearances that are actually the work of a dark wizard trying to gather ingredients for a powerful spell.
One idea could be that in the alternate dimension, Dementors are actually friendly creatures that help protect Hogwarts instead of causing fear. They could use their powers to keep dark wizards at bay in a different way.
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.
One idea could be that in this alternate universe, Hufflepuff is the dominant house in Hogwarts. They have a secret society within the house that holds the key to an ancient magic that can save the wizarding world from a new, unknown threat. And the main character, a Hufflepuff student, discovers this by accident and has to take on the responsibility to gather the members of the society.
Some alternate ending Harry Potter fanfictions are really creative. For example, the entire wizarding world is exposed to the Muggle world in a different way than in the original series. Muggles and wizards start to co - exist peacefully, with Harry being the bridge between the two worlds. Another idea in fanfictions is that the Deathly Hallows are not as important as they seem in the original story. Instead, it's a long - lost spell that Harry discovers that can truly end all dark magic. Also, in some fanfictions, Ginny Weasley becomes a powerful dark witch, which is a complete reversal of her character in the books. It makes for a very interesting and unexpected alternate 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.
An interesting idea could be that the Genie accidentally grants a wrong wish. Let's say Aladdin wishes for something to help him defeat Jafar, but due to a miscommunication, it backfires. This leads to a situation where Aladdin has to find a way to reverse the effects of the wrong wish and still defeat Jafar. It could add a lot of comical and tense moments to the story. For example, he might be turned into a small animal for a while and has to rely on his wits and the help of his friends in this new form.
One interesting idea could be a fanfic that focuses on the Marauders' time at Hogwarts. It could explore their pranks, friendships, and how they came to be the legends that we hear about in the original books. For example, showing how they created the Marauder's Map in more detail.
One interesting idea could be a fanfic where the Marauders attend Hogwarts during modern times. They'd have to deal with things like smartphones and social media while still maintaining their mischievous ways. Another could be a story that focuses on the lives of the house - elves after the events of the books, perhaps exploring their newfound freedom. And a third idea could be a fanfic about a new dark wizard emerging in the wizarding world years after Voldemort's defeat, and how the new generation of Hogwarts students respond.