Another theme could be secrecy and identity. Peter has to keep his identity as Spider - Man a secret, and Toomes also has his own secrets. Fanfictions might play with how they deal with each other's secrets and how it affects their relationship. For example, there could be a plot where they gradually discover each other's true selves and how that changes their bond.
Fanfiction.net could also be a place to look. However, the tagging system might not be as precise as AO3. But still, it has a vast amount of fanfiction, so it's worth a try. Just search for the specific pairing, and you may come across some interesting stories.
One common theme could be the clash of two different worlds. Harry Potter's magical world and Peter Parker's superhero world. Writers might explore how the characters from each universe react to the other's powers and abilities.
One common theme is the clash of different worlds. Peter comes from a more ordinary, albeit super - hero filled, world in New York, while Loki is from Asgard, a realm of gods. Their different backgrounds often lead to misunderstandings and then growth as they learn about each other.
One common theme is self - discovery. The OC often helps Peter to discover new aspects of himself, whether it's related to his powers or his personal life. For example, in some stories, the OC might encourage Peter to be more confident outside of his Spider - Man persona.
Another theme could be the exploration of their different worlds colliding. Peter's New York and Shuri's Wakanda are very different places, and fanfictions often play with how they interact in each other's environments. Also, there's the theme of mutual respect and admiration that develops into a deeper relationship over time.
Team - up is a very common theme. Writers like to imagine how they would work together in a fight. Also, mentorship can be a theme. Thor, being much older and more experienced, could potentially mentor Peter in some aspects. And of course, there's the theme of friendship that develops between two very different individuals.
Mentorship is a very common theme. Tony is often portrayed as guiding Peter in his superhero journey. Another is family, as their relationship can be seen as a father - son or big - brother - little - brother type. And of course, there's the theme of heroism, where they work together to save the day.
One common theme is the exploration of their powers. How Wanda's chaos magic and Peter's spider - abilities can work together or sometimes clash. For example, in some fanfics, they have to learn to control their combined powers to defeat a powerful villain.
Adrian Toomes is a significant antagonist. He's a brilliant inventor who turns to crime to get what he wants. His Vulture suit gives him enhanced abilities and makes him a threat to the heroes.
Another theme is the struggle between normal life and superhero life. Peter has to deal with school, homework, and teenage problems while also being Spider - Man. Fanfictions often show how he manages to juggle these two very different aspects of his existence.