Another interesting concept is a Venom crossover with Doctor Strange. Strange could be investigating some strange magical occurrences that turn out to be related to the symbiote. Venom and Strange would have to find a way to co - exist and use their unique abilities to solve the mystery and defeat whatever dark force is at play.
Perhaps Venom could cross over with the Guardians of the Galaxy. Venom's dark and edgy nature would contrast well with the Guardians' more light - hearted and space - faring adventures. They could be forced to work together to stop a powerful alien threat that is drawn to Venom's symbiote powers.
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 Venom bonding with Hulk. Imagine the power boost and the chaos they could cause together. Another is Venom facing off against Thor. The contrast between Thor's godly powers and Venom's alien abilities would make for an exciting battle. Also, Venom could team up with Black Widow and use his stealth and her combat skills for some undercover missions.
One idea could be a crossover between the X - Men and the Avengers. Imagine Wolverine teaming up with Captain America in a battle against a common enemy like Ultron. Another could be a Spider - Man and Doctor Strange crossover, where Spider - Man's quick thinking and agility combine with Doctor Strange's magic to solve a multiverse - level threat.
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.
A crossover with Doctor Strange could be really cool. Maybe they have to deal with a magical threat that is spreading across different dimensions. Captain Marvel's strength and Doctor Strange's magic would create an interesting dynamic as they try to figure out how to stop it.
How about a story where the Avengers are pitted against Dio? The Avengers would have to deal with Dio's time - stopping ability with their own powers. Iron Man could try to create a device to counteract Dio's time stop, while Captain America uses his strategic skills to lead the fight against Dio's minions.
One idea could be that Batman finds himself in the Marvel universe due to a strange multiverse rift. He teams up with Iron Man to stop a tech - based villain who is stealing advanced technology from both their worlds. Another could be Batman and Spider - Man working together in Gotham. Spider - Man's acrobatics and sense would be a great addition to Batman's detective skills.
A cool dc marvel crossover fanfiction might involve Batman and Iron Man. Picture Batman being intrigued by Iron Man's high - tech gadgets and the two of them collaborating to create an even more advanced piece of technology to defeat a new breed of super - criminals that are using alien and advanced Earth - based tech.
A great concept for Marvel Avengers crossover fanfiction is to have the Avengers cross paths with the Fantastic Four. The two teams could collaborate on a scientific project that goes awry, creating a new threat that only their combined powers can defeat. Another possibility is a crossover with the Eternals. Since the Eternals have been on Earth for a long time but hidden, their discovery by the Avengers could lead to a complex relationship. They might initially be at odds, but then realize they need to work together to stop a greater evil that is awakening on Earth. Also, an Avengers crossover with Blade would be interesting. Blade could seek the Avengers' help in fighting a new breed of vampires that are more powerful than ever and have ties to some dark magic that the Avengers have to figure out.