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.
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.
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.
A unique original character (OC). If the OC has a distinct personality, backstory, and goals that interact well with Thor's world, it's interesting. For example, an OC who is from a different realm and has a special power that Thor has to learn about.
Well, it could be about a BTS member accidentally running into a gymnast YN at a sports event. Maybe they get to know each other gradually and BTS is inspired by YN's dedication in gymnastics. It could also involve YN getting a chance to perform at one of BTS's concerts, creating a unique and exciting plot.
One way is through a charity event. BTS is often involved in charity work, and YN could be performing at a gymnastics - related charity event. They meet there and start interacting. Another way could be if YN is a back - up dancer for another K - pop group and during a big K - pop concert, BTS and YN cross paths.
Rex found himself suddenly in the middle of the Avengers' compound. Confused, he looked around at the heroes going about their daily business. Tony Stark was the first to notice him. 'Who are you, kid?' he asked. Rex stammered out his name. Thor then walked over, his hammer in hand. 'You seem out of place, small one.' But as the Avengers started to question him more, they realized Rex had a unique set of skills. And so, Rex joined their ranks, going on adventures and proving himself to be a valuable addition to the team.
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.
First, know your characters well. Read up on the Avengers and X - Men comics, movies, etc. to understand their powers, personalities, and backstories. For example, if you're writing about Iron Man and Cyclops, you need to know how their different leadership styles might interact. Second, come up with an interesting plot. It could be a new villain that forces them to team up, or a conflict within the combined group. Third, don't be afraid to add your own twists to the story. Maybe give a minor character a major role.
There's a fanfic called 'X - Avenger Team - Up'. It's a shorter but very engaging read. It focuses on a specific mission where a small group of X - Men and Avengers have to work together. The dialogue in it is really well - written, making the characters feel very true to their original versions. It shows how their different personalities can either clash or complement each other during the mission.