It could look like a story where they meet during a superhero convention that's been attacked by villains. They quickly realize they need to work together. Spider - Man swings around saving civilians while Batgirl takes on the villains up close with her combat skills.
It might look like Spider - Man swinging through the streets of Zootopia. He'd be really out of place among all the animals, but he'd quickly adapt. He could use his skills to help the Zootopia police solve crimes that are beyond their capabilities. For example, if there was a criminal using high - tech gadgets to steal from the different districts, Spider - Man's knowledge of technology could be very useful.
In fanfiction, a crossover might start with Spider - Man being abducted by an alien race that the Guardians of the Galaxy are also after. Once they meet, there could be initial mistrust. Spider - Man is used to operating alone in New York, while the Guardians have their own way of doing things in space. But as they realize they are after the same goal, like stopping a powerful weapon from being used, they start to work together. Spider - Man's agility and quick thinking would be a great asset to the Guardians, and their knowledge of the galaxy and advanced technology could help Spider - Man in ways he never imagined.
A Naruto - Iron Man crossover fanfiction could also explore their different personalities. Naruto is often very impulsive and hot - headed, while Iron Man is more calculating and sarcastic. Their interactions could be filled with humorous moments as they clash due to their different ways of thinking, but also grow to respect each other as they face challenges together. For instance, Naruto might want to rush into battle, but Iron Man would stop him and explain the need for a proper plan.
Well, their team - up would be amazing. Spider - Man's acrobatic skills and web - slinging along with Supergirl's super strength and flight could make for some really cool action scenes. They could fight villains that neither could handle alone. For example, a powerful alien who can resist Spider - Man's physical attacks but is vulnerable to Supergirl's heat vision, and at the same time, Supergirl might need Spider - Man's quick thinking and agility to deal with the villain's minions.
A possible plot could be that a mad scientist on Earth creates a device that accidentally opens a portal to Eternia. Through this portal, strange creatures start to invade Earth. Superman tries to stop them but realizes he needs help. He travels through the portal to Eternia and meets He - Man. Together, they embark on a journey to find the source of the device on Earth and close the portal, all while fighting off the various threats that come their way.
Well, in a fanfiction story, it might involve a more complex plot. Imagine a world where mutants and superheroes are at odds, and Spider - Man and Emma Frost are on opposite sides initially. But they both realize that there's a greater threat that requires their combined efforts. As they work together, they see the good in each other. Spider - Man is attracted to Emma's strength and intelligence, while she's drawn to his selfless heroism. Their relationship could be full of passion and conflict as they try to bridge the gap between their two worlds.
A fanfiction could be about a scientific experiment gone wrong that gives Batgirl some of Spider - Man's powers, like the ability to stick to walls. She then has to learn to control these new powers with Spider - Man's help, all while facing off against a villain who wants to steal her new powers for their own evil plans.
In such a fanfiction, the cultural differences between the MCU and the Spider - Verse could be an interesting aspect. The MCU has its own tone and style, which is different from the more diverse and wacky worlds of the Spider - Verse. The characters could struggle to adapt to each other's universes while trying to work together. For instance, Peter Parker from the MCU might be shocked by the more out - there technology or the different social structures in some of the Spider - Verse cities. They could learn from each other and grow as characters while dealing with the overarching plot of saving their respective universes.
Captain America could also be an interesting crossover. They have different outlooks - Spider - Man is young and still learning, while Captain America has strong moral values. A story where they team up to stop a group of super - villains who are trying to undermine the city. Captain America could teach Spider - Man about leadership and making tough decisions.
A Gintama and Naruto crossover fanfiction could be really interesting. It might start with Naruto characters somehow ending up in the Gintama world. Maybe Naruto and his friends are on a strange mission and get sucked through a portal into Edo. They would be shocked by the wacky and modern - yet still somewhat feudal - nature of the Gintama world. Gintoki could mistake them for some new weirdoes in town. And then there could be all kinds of chaos as Naruto tries to use his jutsu, which might have unexpected effects in the Gintama universe due to its different rules of physics and such.