Another interesting plot could be that a mad scientist creates a device that can separate Venom from his host. However, the separation goes wrong and the symbiote energy starts to spread across the city, infecting people. Spider - Man and Venom must work together to find a way to contain the energy and save the city.
Well, a cool Venom and Spider - Man crossover fanfiction idea might be that there's a strange alien invasion. But this time, the symbiotes are being controlled by an even greater evil. Venom, having his own sense of justice, decides to work with Spider - Man. They start off not trusting each other much, but as they face the challenges, they learn to rely on one another. Also, perhaps Spider - Man has to deal with some of Venom's more violent tendencies during the fight.
Well, a cool plot could be that there's a scientific experiment gone wrong that fuses Venom and Spider - Man's powers in an unexpected way. They have to figure out how to control these new combined abilities while also dealing with villains who want to steal their power source. Or perhaps Venom gets amnesia and Spider - Man has to convince him that they were once enemies but now need to work together. There could also be a story where Venom's offspring has a different relationship with Spider - Man, like it's more of an anti - hero sidekick.
One idea could be Venom and Spider - Man teaming up against a new, more powerful symbiote that threatens the city. They have to put aside their differences and use their combined powers to defeat it.
Perhaps in a fanfiction, Venom is actually a creation of one of the villains in Homecoming who wants to use it to defeat Spider - Man. But the symbiote has a mind of its own and instead starts to have an odd connection with Spider - Man, leading to a complex relationship where they have to figure out if they can trust each other.
One idea could be a Venom crossover with Spider - Man in an alternate universe where they have to team up against a common enemy like Carnage. Another could be a Venom and Deadpool crossover, with their crazy personalities clashing and then somehow working together. Maybe a Venom crossover with the X - Men, where Venom's alien nature causes some interesting reactions among the mutants.
One idea could be that the OC has a special power that can either enhance or counteract Venom's abilities. For example, the OC might be able to emit a frequency that calms Venom when he's in a rage. Another plot could involve the OC being from a different dimension and getting stuck in Spider - Man's world, and Venom takes an immediate interest in this strange new being. They could start as enemies but gradually form an alliance as they face common threats.
One idea could be a crossover with the X - Men. Spider - Man could find himself in the middle of a battle between the X - Men and some common enemy, like the Sinister Six. He'd have to figure out how to work with mutants, which is a whole new experience for him. Another idea is a crossover with the Fantastic Four. Maybe Spider - Man gets caught up in one of their space - related adventures. Reed Richards could be fascinated by his web - shooters and try to study them, while Spider - Man would be in awe of their super - scientific gadgets.
A crossover with the Avengers is also great. Picture Spider - Man having to prove himself to the more established heroes like Iron Man and Captain America. He could bring his unique street - level hero skills to a big - scale Avengers mission.
One idea could be a crossover between Spider - Man and an original character (OC) who has the power to manipulate time. The OC could accidentally disrupt the timeline in Spider - Man's world, leading to all sorts of chaos like villains getting released early or important events not happening as they should. This would force Spider - Man to team up with the OC to fix the timeline.
Perhaps in the fanfiction, Spider - Man's sense of humor clashes with the more serious tone of the DC heroes at first. But then they realize they can learn from each other. For example, Superman could teach Spider - Man how to better control his strength, while Spider - Man shows the DC heroes how to have a more light - hearted approach in the face of danger. And they all come together to fight a common enemy like Darkseid who has somehow managed to get his hands on some of Spider - Man's tech.