Another idea is that there's some sort of interdimensional rift that brings Supergirl to Spider - man's world. At first, they might be a bit suspicious of each other, but then they realize they have a lot in common. They could start sharing their stories and then work together to find a way to send Supergirl back to her own dimension while also dealing with any local threats in Spider - man's city.
Perhaps there's a mad scientist who has created a device that can manipulate time and space. This device causes disruptions that draw the attention of both Supergirl and Spider - man. They meet during their investigations. Supergirl's heat vision and other powers, along with Spider - man's spider - sense, help them figure out the scientist's plan. They then have to race against time to stop the device from causing even more chaos across the two universes.
Well, one possibility could be that they team up to fight a new super - villain in the city. Maybe this villain has some special powers that require both of their unique skills to defeat.
The fanfiction could start with Wolverine coming to New York for some personal reasons. There, he crosses paths with Spider - Man. Soon, they discover that a powerful and mysterious figure is causing chaos in the city by mind - controlling both humans and mutants. To stop this threat, they must put aside their differences and use their unique abilities. Spider - Man can use his spider - sense to detect the mind - controlled individuals, while Wolverine can cut through any physical barriers the enemy might create.
Supergirl's super strength and invulnerability could provide a good defense for Spider - man. When they face really tough opponents, she could take the brunt of the attacks. Meanwhile, Spider - man's agility and ability to climb walls could help them access hard - to - reach places during their adventures. His spider - sense could also give them an early warning of danger that Supergirl might not detect right away with her normal senses.
Well, it could be about them teaming up to fight a new supervillain in the city. Maybe they start off not getting along because they have different fighting styles, but then they learn from each other and become great partners.
Perhaps in the fanfic, Ant Man accidentally shrinks himself too much and gets lost in Spider Man's suit. Spider Man then has to figure out how to get him out without harming him. Meanwhile, they discover that there's a mini - world inside the suit with its own set of problems, like tiny villains causing chaos, and they have to deal with that together.
They could exchange their experiences of being a superhero. Spider Man has been through a lot in his own world, and Spider Woman would have her own set of challenges. Sharing their stories could help them grow as heroes and also deepen their connection.
Well, in such a fanfiction, Spider Man might initially be very suspicious of Loki. After all, Loki has a reputation for being a trickster. Maybe Loki would try to play some mind games with Spider Man, but Spider Man's quick wit and sense of humor would help him see through the tricks. They could end up teaming up against a common enemy, like an alien invasion that threatens both their worlds.
Well, they could team up to fight a common enemy. Maybe some villain who is stealing advanced Wakandan technology and causing chaos in New York. Shuri's scientific genius combined with Spider - Man's agility and spider - sense would make them a formidable duo.
Well, in such a fanfiction, Spider Man and Batman could start off as enemies. Maybe they misunderstand each other's motives in Gotham or New York. For example, Spider Man might think Batman is too harsh in his methods and Batman could see Spider Man as an unruly vigilante. But then, as the story progresses, they realize they have a lot in common. They both lost their parents and are driven by a sense of justice. So they could team up to fight a common enemy like the Joker and the Green Goblin together, combining their unique skills and gadgets.
Perhaps in the fanfiction, the Punisher is initially mistaken for a criminal by Spider - Man. Spider - Man tries to stop him from what he thinks is a brutal act of vigilantism. But as the story unfolds, Spider - Man discovers that the Punisher is actually targeting a really bad guy who has slipped through the legal system. This leads to a complex relationship where Spider - Man has to decide whether to support the Punisher's actions or try to bring him to justice in his own way.