A Spider - Man crossover with the Avengers always has great potential. He could interact with characters like Iron Man, learning new tech from him or having friendly banter about who has the cooler suit. Another concept could be a crossover with the Teenage Mutant Ninja Turtles. They could fight crime together in the sewers of New York, with Spider - Man swinging above and the Turtles doing their ninja moves below.
In some fanfics, a crossover with DC's Batman can be really cool. They both are street - level heroes with their own set of skills. Spider - Man's acrobatic fighting style combined with Batman's detective skills could lead to some amazing storylines. For example, they could team up to take on a common enemy like the Joker who has some sort of plan in New York.
One interesting concept could be a crossover with the X - Men. Imagine Spider - Man teaming up with Wolverine, their different fighting styles and personalities would create a great dynamic. Wolverine's brute force and self - healing ability combined with Spider - Man's agility and web - slinging would make for some exciting action scenes.
One interesting concept could be the different relationships that Spider - Man forms with various characters in the harem. For example, his interactions with different versions of Gwen Stacy or Mary Jane could be explored in unique ways. Maybe there are stories where they all team up to fight villains together while also dealing with their complex feelings for Spider - Man.
One idea could be that Spider - Man gets accidentally transported to the DC universe. He teams up with Batman to take on a common enemy like the Joker who has somehow gotten his hands on some Oscorp tech. They combine their detective skills and combat abilities to stop the chaos.
In an 'ultimate spider man crossover fanfic', a really interesting crossover could be with Venom. But instead of being enemies, they team up. Maybe there's a new symbiote - like threat that is even more powerful and they have to combine their powers to defeat it. Another idea is a crossover with the Guardians of the Galaxy. Spider - Man gets accidentally transported into space and has to team up with Star - Lord and the gang to get back home while also fighting off some space - pirates.
One idea could be that Spider - Man gets accidentally transported to the DC universe. He teams up with Batman to take on a new villain that is a combination of their rogues' galleries. For example, a villain who has the powers of Electro and can also control minds like Brainiac.
One interesting concept could be how the gamer aspect affects Spider - Man's abilities. Maybe in the fanfiction, he can level up his powers like in a game, which would be really cool.
One interesting concept could be exploring Spider Man's early days in a more in - depth way than the official comics or movies. Maybe showing his first encounters with villains from a different perspective.
One interesting concept could be Spider Man being reincarnated in a different time period. For example, he might be reborn in a future where technology has advanced beyond recognition. This could lead to new and unique storylines as he tries to adapt his powers to this new world.
One interesting concept could be the evolution of Spider - Man's powers. Maybe he develops new web - shooting abilities or enhanced strength. Another could be his relationships evolving, like his friendship with Harry Osborn taking a new turn. And sometimes, in fanfiction, we might see his suit evolving in ways that the original comics or movies haven't shown yet.
Another aspect could be the relationships. Perhaps the fanfiction delves deeper into his relationships with his friends and foes. Like, his friendship with Ned could take on a new dimension, or his rivalry with the Green Goblin could have some unexpected twists.