It could be Venom. If Venom got into the wizarding world, he could possess some of the students or creatures. His dark and menacing presence would be a huge contrast to the usually more magical and somewhat lighter - hearted threats in the Harry Potter world. He could be really hard to defeat as he could keep changing hosts and using different magical abilities of those he possesses.
I think Doctor Octopus would be fascinating. His mechanical arms could be enchanted with magic in the wizarding world. He could use his intelligence to try and combine magic and technology in a way that is very dangerous. He might try to take over Hogwarts, thinking it's a great place to conduct his experiments with this new combination of power sources.
The Green Goblin would be really interesting. Imagine him getting his hands on a wand and trying to use magic in his own chaotic way. His maniacal laughter would echo through Hogwarts as he zooms around on his glider, causing mayhem.
The Green Goblin could be a likely villain. He has a long history with Spiderman and his maniacal nature would put him at odds with both Spiderman and Deadpool. His glider and pumpkin bombs would be a real threat to them.
Perhaps the Green Goblin could be the villain. He's a classic Spiderman foe and could pose a real threat to both Spiderman and the Shadow.
Spiderman and Black Widow could be an interesting pair. Black Widow's stealth and combat skills combined with Spiderman's agility and spider - sense. They could go on undercover missions where Spiderman's ability to climb walls and swing around would give them an edge in sneaking around and getting information.
It could be a dark wizard who wants to use Newt's knowledge of magical creatures for evil purposes. Maybe he wants to control a powerful and dangerous creature and use it to take over the wizarding world.
Hermione and Sakura would be a great combination. Hermione is highly intelligent and book - smart, while Sakura is a skilled medical ninja with her own growth arc in terms of strength and confidence. They could exchange knowledge, with Hermione teaching Sakura about the complex magic theories and Sakura showing Hermione some of the medical ninjutsu. They could also work together to solve problems, using their combined wits and skills.
Tom Felton, who played Draco Malfoy, could also be a great choice. He could show a different side of Draco in the fanfiction. Maybe he could have a change of heart and become friends with Harry and his friends. The contrast between his on - screen mean - spirited Draco and a more redeemed version would make for an engaging storyline.
Hermione Granger and Weiss Schnee could be a great pair. Hermione is highly intelligent and studious, while Weiss is refined and also has a great deal of knowledge. They could bond over their love for learning and perhaps work together on some sort of magical - mechanical hybrid project. For example, combining Hermione's magic knowledge with Weiss' understanding of Dust to create something entirely new.
Hermione Granger and Sherlock would be an interesting pair. Hermione is extremely intelligent and well - read in magic. Sherlock is a master of deduction. She could introduce him to the complex world of magic, and he could help her with his logical thinking when it comes to non - magical mysteries at Hogwarts. They could also have some really interesting debates about the nature of knowledge, whether it's through magic or pure logic.
I think Hermione would be really interesting too. She is so intelligent and knowledgeable about magic. When she meets Captain America, she would probably be very curious about his world and how things work without magic. She could be the one to try and find a way to bridge the gap between the two worlds, like trying to figure out how Muggle technology and magic could work together.
The interaction between Hermione and Carlisle would be really interesting. Hermione is super intelligent and always eager to learn, and Carlisle is a very old and knowledgeable vampire. They could have deep discussions about the nature of life, death, and immortality. Hermione might be fascinated by how Carlisle has managed to retain his humanity over the centuries, while Carlisle could be intrigued by Hermione's vast knowledge of magic and her strong moral compass.