Fanfiction involving Harry Potter, Harry, Neville and Naruto: What are some interesting plot ideas?

Another plot could be that Harry and Neville are actually long - lost twins separated at birth. They start having strange dreams about each other and then figure out the truth. This revelation would change their relationship and how they see themselves in the wizarding world. They could then team up to face a new, powerful dark force that is emerging, using their combined skills and the new - found bond between them.

One idea could be that Harry and Neville form an alliance to secretly train students in advanced defensive magic outside of Umbridge's notice during her reign at Hogwarts. They could use the Room of Requirement as their base.

One idea could be that Neville discovers a magical potion that enhances muscle growth as part of a Herbology experiment gone wrong. This causes him to rapidly gain muscles and he has to figure out how to control this new strength. He might accidentally break things around Hogwarts at first, but then learns to use it for good, like in a Quidditch match where he uses his strength to save a player from a dangerous fall.

One great 'Harry Potter' fanfiction with Neville and Draco is 'The Unlikely Bond'. In it, they are forced to work together on a school project. At first, they clash due to their different personalities and house loyalties. Draco is his usual snobbish self, while Neville is shy but determined. As the story progresses, they start to understand each other better. Neville shows Draco the importance of kindness and hard work, and Draco helps Neville become more confident in standing up for himself.

One idea could be a crossover where Pietro uses his super speed to deliver important Hogwarts letters that the owls can't manage in time. Another could be that Pietro accidentally enters the wizarding world and has to learn magic while Harry helps him adapt. Maybe Pietro's sister Wanda also gets involved and her magic interacts in strange ways with the Hogwarts spells.

One plot idea could be that Urahara Kisuke somehow ends up in the Harry Potter universe. He might use his unique inventions and skills from the Bleach world to help Harry and his friends in their fight against Voldemort. For example, his kido skills could be translated into new spells in the wizarding world.

A plot could be about a student who has a phobia of large groups (agoraphobia). At Hogwarts, there are always big gatherings in the Great Hall, Quidditch matches, etc. This character could struggle to attend these events. Their friends could try to help them gradually face their fear, and in the process, they might discover a magical solution or just the power of friendship to overcome it.

Perhaps a fanfiction where the Basilisk is not a solitary monster but part of a larger, more complex ecosystem in the Chamber of Secrets. There could be other magical creatures that depend on the Basilisk in some way, and when the Basilisk is in danger, these other creatures come to its aid. This would change the whole dynamic of how the characters interact with the Basilisk and the Chamber of Secrets.

One idea could be a time - travel fanfiction where Harry, Hermione, Neville and Luna are sent back in time to the era of the Marauders. They could interact with James, Sirius, Remus and Peter, and perhaps change some of the events that led to the downfall of the Marauders. For example, they could prevent Peter from betraying his friends.

One idea could be that Harry Potter is reborn in the Naruto world as an Uzumaki. He could use his magical knowledge in unique ways, like using magic to enhance his chakra control. Maybe he creates new jutsu that combine magic and chakra, such as a spell - enhanced Rasengan.