Even one of Spider - Man's fellow superhero friends might betray him. Maybe they get jealous of Spider - Man's popularity or feel that he is getting all the credit for their team's successes. This internal betrayal would add a lot of drama and conflict to the fanfiction story.
One possible fanfiction could be about Peter Parker using his Spider - Man abilities in a snow - covered city during a cold snap. Maybe he has to deal with villains who are taking advantage of the difficult weather conditions. For example, a villain could be using the snow and ice to create dangerous traps for the citizens, and Spider - Man has to swing through the icy streets to stop them.
Peter Parker as Spider - Man is obviously a popular character. He's the main protagonist. Venom is often a popular character in fanfictions as well. His dark and menacing nature contrasts with Spider - Man's heroic side. Mary Jane might also be popular as she is an important part of Spider - Man's story. Another could be Harry Osborn, as his relationship with Peter is always an interesting aspect to explore in fanfictions.
Deadpool in fanfiction with Ultimate Spider - Man can be a source of comedic relief. His fourth - wall - breaking and over - the - top personality contrast with Spider - Man's more serious and relatable nature. This can lead to some really interesting interactions. For instance, Deadpool might make jokes about Spider - Man's costume or his love life, while Spider - Man tries to stay focused on the task at hand, like stopping a villain. Their relationship can range from reluctant allies to begrudging friends, depending on how the author writes it.
How about a new villain created specifically for the fanfiction? A being made up of the combined negative energy from all the spider - verses. This entity could be called the 'Void - Spider' and it feeds on the chaos and destruction that often follows Spider - Man in his battles. It would be a very powerful and unique threat that the Spider - Men from different universes would have to face together.
Maybe a fanfiction where all the Spider - Men and Women from different spider - verses team up to fight a common enemy that threatens all of their universes. It could be a powerful cosmic entity that is consuming the multiverse, and they have to combine their unique skills and knowledge to stop it. This would allow for a lot of cool interactions between the different characters.
In some fanfictions, Scarlet Spider might face a threat that is specifically targeting him because of his connection to Spider - Man. This could lead to a series of intense battles and investigations. He has to use his unique skills, like his enhanced agility and his ability to stick to walls, to outwit the enemy and protect those he cares about.