One possible plot could be that Thor ends up in the wizarding world of Harry Potter. Maybe the Bifrost malfunctions and he lands near Hogwarts. He could be mistaken for a very powerful wizard at first. Then he teams up with Harry Potter and his friends to fight against a new dark threat that is using both magic and some form of Asgardian - like power. Thor could teach the wizards about Asgardian combat and they could teach him more about the nuances of magic.
The plot might involve a magical object in the Potterverse that has a connection to Asgard. Thor is sent to retrieve it. He meets Harry and they initially clash because of their different ways of doing things. But then they realize they need each other. Thor's strength and lightning powers combined with Harry's magic and knowledge of the wizarding world could be used to defeat a villain who wants to use the object to gain ultimate power over both worlds.
It could be Loki. Since he has a knack for causing trouble, he might find a way to cross over to the wizarding world. He could manipulate the dark wizards and use their magic for his own devious plans. Maybe he wants to steal the Philosopher's Stone to gain immortality and use it to take over Asgard as well.
One possible plot could be that Thor somehow gets transported to the wizarding world. He might initially be confused by the magic there as it's different from his Asgardian powers. Harry Potter and his friends could be intrigued by Thor and his hammer. They might team up to fight a common enemy, perhaps a dark wizard who has somehow got hold of some Asgardian artifact and is misusing its power.
Yes, there are quite a few out there. You can start by looking on fanfiction websites like Archive of Our Own. Just search for 'Harry Potter x Thor Odinson' and you'll get a list of stories. Some might be crossovers where Harry and Thor meet in a magical world, while others could have more creative plotlines like Thor visiting Hogwarts or Harry traveling to Asgard.
One common theme is the clash of cultures. Harry comes from a world of wizards with their own set of rules and traditions, and Thor is from Asgard with its warrior culture. Another theme could be the exploration of power. Harry has his magic, and Thor has his godly strength. Writers often like to see how these two forms of power interact.
A powerful dementor - like being that has been corrupted by Asgardian dark magic. This entity could be draining the life force of both wizards and Asgardians. It would be up to Thor and Harry Potter to find a way to stop it, as it poses a threat to both of their worlds.
Well, it could be that Harry Potter uses his magic skills like the Patronus charm against Thor's lightning. Maybe Thor mistakes Harry's magic for some new Asgardian sorcery at first. And then they start to fight over some misunderstanding, like a magical artifact that Thor thinks is from Asgard but Harry knows is important for the wizarding world.
One possible plot could be that the Halliwell sisters from 'Charmed' somehow get transported to the wizarding world of 'Harry Potter'. They could use their powers to help Harry and his friends in a battle against Voldemort. For example, Piper could freeze Death Eaters with her time - stopping power, while Phoebe could use her premonition power to foresee Voldemort's next moves.
One idea could be that the Avengers find themselves magically transported to the wizarding world. Thor, with his Asgardian magic, might have an interesting interaction with the Hogwarts professors. Maybe they team up to fight a new, combined threat that is both magical and technological.
Thor Odinson, the mighty Asgardian, fell in love with a simple Midgardian girl named Jane. Their story began when Thor was banished to Earth. Jane, a brilliant astrophysicist, was intrigued by the strange phenomena that followed Thor's arrival. One day, while she was out in the desert researching, she stumbled upon Thor. At first, he was a bit of an enigma to her, but as they spent more time together, she saw his kind heart beneath his tough exterior. Thor, on the other hand, was drawn to Jane's intelligence and her unwavering curiosity. Their relationship grew slowly, with shared adventures and a deepening understanding of each other's worlds.
Yes, there are likely some out there. Fans often create crossover fanfics that combine different universes like 'Hitman' and 'Harry Potter'. These can be really interesting as they blend the magic and mystery of 'Harry Potter' with the stealth and assassin - like nature of 'Hitman'.