One idea could be that Spiderman gets transported to the DC universe due to a multiverse glitch. He teams up with Batman to stop a villain who has stolen technology from both universes. Another could be that Peter Parker goes to Metropolis for a science fair and accidentally gets involved in a battle between Superman and Lex Luthor, using his Spidey - sense and skills to help Superman.
Maybe in this fanfic, there's a multiverse crisis that causes parts of New York in the Marvel universe to merge with Gotham in the DC universe. Spiderman and Superman meet and initially have a bit of a misunderstanding due to their different ways of handling things. But then they realize they need to work together to separate the two cities again. Spiderman could use his webs to help Superman contain some of the chaos while Superman uses his strength to move large structures that are in the way.
Spiderman and Batman would be really interesting. They are both intelligent and resourceful. Batman has his gadgets and detective skills, while Spiderman has his super - strength and web - slinging. They could learn a lot from each other.
Spiderman and Green Lantern. Green Lantern's power ring can create all kinds of constructs, and Spiderman could use his webs to enhance or modify those constructs. They could work together to build a huge structure to stop a giant alien invasion that is threatening both the Marvel and DC universes.
One idea could be that Spider - Man gets transported to the DC universe through some sort of interdimensional rift. He teams up with Batman to stop a new villain who has the powers of both Green Goblin and the Joker. Their combined detective skills and combat abilities would make for an exciting story.
In a dark Gotham alley, Batman is on patrol when a strange web shoots across his path. Out of the shadows emerges Spider - Man. 'Hey, Bats! Heard this city could use some help.' Batman, initially cautious, realizes they could work together. They team up to take on a new villain who has a blend of high - tech gadgets and super - strength. Spider - Man's quips lighten the mood as Batman strategizes. Together, they swing and glide through Gotham, finally defeating the bad guy.
I think Spider - Man and Harley Quinn could be a really interesting pair. Harley's chaotic nature and unpredictable behavior would mix well with Spider - Man's sense of responsibility. They could start off as unlikely allies, with Harley initially trying to play tricks on Spider - Man but then realizing they have a common enemy and working together in a really unique way.
One possible fanfic could start with Spiderman being transported to the Destiny universe. He might be confused at first, seeing all the strange alien landscapes and advanced technology. Maybe he teams up with a Guardian to fight off the Fallen. He uses his web - slinging abilities to navigate the complex terrains of Destiny's planets, while the Guardian provides firepower. Together, they become an unstoppable force, protecting the innocent in this new and dangerous world.
One way a Spiderman x Artemis fanfic could start is with Spiderman swinging through the city and suddenly getting zapped into Artemis' realm. He's confused at first but then realizes he has to work with Artemis to get back home. Along the way, they start to respect each other's abilities and form an unlikely friendship. They might even combine their powers to defeat a villain who is trying to disrupt both their worlds.