What could be an interesting plot in a 'harry potter fleet of fod crossover fanfiction'?

Definitely Harry Potter himself. His courage and magical abilities would make him a key figure in any adventure involving the fleet of Fod. Hermione would also be great as she could study and figure out the Fodian magic related to the fleet. And Hagrid, because his love for magical creatures might help in dealing with any strange beasts associated with the fleet.

Well, perhaps the 'Fleet of Fog' enters the wizarding world and the wizards initially mistake them for some new kind of dark magic creatures. Harry and his friends then have to figure out what they are and find a way to either make peace or drive them away. The wizards could use their magic to try and understand the technology of the Fleet of Fog, like Ron trying to figure out how their engines work with a simple 'Engorgio' spell on some of the parts to see what happens.

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.

I think Neville could be an interesting main character in this crossover. He has grown so much in the Harry Potter series, and his knowledge of plants could be used in some unique ways against the Fleet of Fog. For example, he could use some magical plants to either hide Hogwarts from the Fleet of Fog's sensors or use them as a form of defense. From the Fleet of Fog, a young and curious engineer could be a main character. They would be fascinated by the magic and would try to figure out how to incorporate it into their technology. Ginny Weasley could also be a main character, with her strong will and magical abilities.

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.

One idea could be that Eragon, while on one of his adventures in Alagaësia, accidentally creates a portal that leads him to Hogwarts. There, he meets Harry Potter and they quickly realize they have a lot in common. They could team up to fight against a dark force that somehow threatens both their worlds, like a new type of dark magic that combines the magic of Alagaësia and the dark arts from the wizarding world.

In a more comical plot, Hagrid could accidentally stumble upon a small Transformer while in the Forbidden Forest. Thinking it's a strange magical creature, he brings it back to Hogwarts. The Transformer, being a bit lost in this new magical world, causes all sorts of chaos in the castle. Harry and his friends have to figure out how to get the Transformer back to where it belongs while also dealing with the daily challenges at Hogwarts.