Common themes include the exploration of their powers and how they complement each other. For instance, Peter's agility and Natasha's stealth. There's also the theme of family in some cases. Peter has his Aunt May, and Natasha has her complex past with the Red Room. Fanfictions may bring these family aspects into their relationship, like how Natasha could offer a different kind of family support to Peter, or how Peter's family values could influence Natasha.
One common theme is the clash of their different backgrounds. Peter is young and relatively new to the superhero world, while Black Widow has a lot of past experiences. Another theme could be how they handle the responsibilities of a new life coming.
Yes, there are quite a few out there. You can start by looking on fanfiction websites like Archive of Our Own. Just search for 'Peter Parker x Black Widow' and you'll get a list of stories. Some might be AU (alternate universe) stories which can be really interesting as they can put the two characters in different scenarios than the original Marvel universe.
One common theme is the struggle with the symbiote's influence. The black suit gives Peter enhanced powers but also tries to corrupt him, so many fanfictions explore how he copes with that. For example, he might have to fight against the suit's urge to be more violent.
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.
Survival is a big theme too. They might be facing a powerful enemy or a dangerous situation. So, they have to use all their resources and skills to survive. Also, the theme of friendship can't be ignored. As Peter spends time with the family, strong friendships are formed that help them in their various endeavors.