What could be an interesting plot for a Harry Potter Stranger Things crossover fanfiction?

The plot could involve a new, super - powerful entity that is a combination of the Upside Down's dark forces and a kaiju - like being. This entity starts to wreak havoc in both Godzilla's world and Hawkins. The Stranger Things kids find a way to call Godzilla for help, and Godzilla arrives just in time to face this new threat. As they fight together, they learn about each other's strengths and weaknesses. Eleven uses her powers to enhance Godzilla's attacks, while Godzilla's presence scares off some of the smaller Upside Down creatures, giving the kids a chance to regroup and plan their next move.

One idea could be that the Demogorgon from Stranger Things somehow finds its way into the wizarding world of Harry Potter. The Hogwarts students, with their magic, have to figure out how to stop it. Another could be that Eleven has some latent wizarding abilities and she gets a letter from Hogwarts, then has to navigate both the Upside Down and the magical world.

A cool plot could involve the Demogorgon from Stranger Things being somehow related to It. The Losers' Club and the kids from Stranger Things have to figure out this connection and stop both threats. The Losers' Club could share their knowledge of facing supernatural horrors with the Stranger Things kids, and vice versa. For example, Dustin's knowledge of science might help in understanding the nature of It, while Bill's leadership skills could inspire Mike Wheeler.

Well, perhaps the magical creatures from the Harry Potter universe end up in the '300' setting. Dragons could be used by the Spartans to fight their enemies. The centaurs could also join the battle, lending their archery skills. And Harry could learn some combat skills from the Spartans, which he could then use back in the wizarding world to fight Voldemort's Death Eaters.

Definitely Harry and Eleven. Harry has his own special powers in the wizarding world, being able to speak Parseltongue and having the power of love that saved him from Voldemort. Eleven has her telekinesis and other abilities. They could learn from each other. Harry could teach Eleven about the different types of magic, and Eleven could show Harry how to use her powers in a more creative way. Another interesting pairing would be Hermione and Dustin. They're both super smart. Hermione could introduce Dustin to the vast library of Hogwarts and all the knowledge it holds, while Dustin could share his knowledge of science and technology with Hermione, and they could come up with some really cool ideas that combine magic and science.

Well, in some fanfictions, Eleven could be sent to Hogwarts by mistake. Since she has telekinetic powers, the wizards might initially be very confused and intrigued by her abilities. She could form an unlikely friendship with Hermione, as both are very intelligent and resourceful. And then there's the idea of the Demogorgons being related to some dark magic creature from the Harry Potter universe, and the two sets of characters have to figure out how to defeat them together.

The Stargate could be a portal between different magical realms in the Harry Potter universe. For example, it could lead to a place where ancient and more powerful magic exists. Wizards from different schools around the world could team up with Stargate explorers to uncover the secrets of this new place. There might be a new threat emerging from this realm that requires both magic and Stargate technology to defeat. This would bring together characters like Harry Potter and Jack O'Neill to lead the charge against the common enemy.

Well, perhaps there's a rift in the multiverse that connects Central City to Hogwarts. The Flash, while chasing a villain, gets sucked into the wizarding world. Harry Potter and his friends initially suspect him as a threat but then realize his good intentions. They then combine their powers - the Flash's speed and the magic of the wizards - to fight a common enemy. For example, the Flash could use his speed to distribute protective spells all over Hogwarts really quickly, while Harry and his friends focus on the offensive magic against the bad guys.

One idea could be that Carly and her friends discover a magical portal in their apartment that leads to Hogwarts. They then have to navigate the wizarding world, with Carly being fascinated by all the magic. Meanwhile, Harry Potter and his friends are intrigued by the strange Muggle - like devices the iCarly gang has. They end up teaming up to solve a mystery that involves both the wizarding and Muggle worlds.

Well, perhaps the Death Note from the Bleach universe gets mixed up with the magic in Harry Potter's world. A powerful wizard could get hold of it and start using it in ways that disrupt the balance of life and death in both worlds. Harry and his friends would have to figure out how to stop this misuse, with the help of some Bleach characters who understand the true nature of the Death Note.