One common theme is the 'fish out of water' concept. Since Supergirl is an alien and Spiderman is a street - level hero in a different world, their interactions often involve one or both of them feeling out of place in the other's environment.
Another theme is friendship or romance. Some fanfictions explore a deep friendship that develops between them as they learn about each other's strengths and weaknesses. Others may take it a step further and explore a romantic relationship, imagining how two such different heroes could fall in love.
The theme of power and responsibility is also common. Both characters have great power and in fanfiction, they often have to figure out how to use it together to save the day. They might debate on different approaches to handling threats, which ties into this theme.
The common themes in spiderman and supergirl romance fanfiction are numerous. One is the discovery of love in unexpected circumstances. Maybe they meet during a battle against a common enemy and something clicks between them. Another theme is about trust. They have to trust each other with their secret identities and also trust in their relationship. The theme of sacrifice also appears often. For example, they might have to sacrifice their personal desires or even their safety for the sake of the other. And the theme of growth, both as individuals and as a couple, is also quite common as they navigate their relationship while still being superheroes.
One common trope is the 'fish out of water' situation. Since they come from different universes, Supergirl might be confused by the more gritty and street - level problems in Spiderman's world, like petty crime. Another is the 'power couple' idea, where they are seen as a strong duo, both physically and in terms of their abilities.
The theme of self - discovery is also prevalent. Supergirl may be on a journey to find out who she really is, not just as a superhero but as a person. This can include exploring her likes, dislikes, and her place in the universe.
Another theme is the support system around her. Her friends, family, and colleagues might offer different kinds of support, like emotional support or helping with her superhero tasks. For example, her best friend might cover for her when she has a doctor's appointment.
Love and romance can be a theme in some cases, not necessarily between Arrow and Supergirl directly, but perhaps within their respective teams or with other characters they interact with in the fanfiction world. It adds an extra layer of complexity to the relationships and the overall story.
A third common theme is the exploration of new powers. Since these are original characters, they often have powers that are different from what we've seen in the regular Supergirl story. Writers like to play with these new powers and how they can be used in different situations, like fighting new villains or solving problems in National City.
There's also 'When Spiderman Met Supergirl: A New Dawn'. This fanfiction delves into the relationship between the two. It starts with a chance encounter and then develops into a story about how they inspire each other to be better heroes. It shows how their different backgrounds and values can complement each other.
One common theme is the exploration of his dual identity. Writers often delve into how Peter Parker balances his normal life with his responsibilities as Spiderman. Another theme is his relationships, whether it's with Mary Jane, his friends, or other superheroes.
Love and romance can also be a common theme, although it can be a bit controversial given their family relation in the official lore. However, in fanfiction, authors often re - imagine their relationship in a way that allows for a romantic connection. Also, the theme of self - discovery is present. They both are constantly learning about their powers and themselves, and fanfictions sometimes focus on how they help each other in this journey of self - discovery.
Writing or discussing sexual fanfiction is inappropriate and goes against ethical and moral guidelines, so I cannot provide relevant content.