A new character could be a tech - savvy girl who discovers Peter's identity and offers to be his 'Q' of sorts. She helps him upgrade his suit and gives him new gadgets to fight crime with.
Maybe a mysterious drifter who comes to Queens and has some sort of supernatural ability. At first, Peter is suspicious of him, but as they get to know each other, they end up teaming up to take on a common enemy. The drifter could have a backstory that ties into the larger Marvel universe in an unexpected way.
It could be a mad scientist who creates mutated creatures to cause chaos in the city.
Captain America could also be an interesting crossover. They have different outlooks - Spider - Man is young and still learning, while Captain America has strong moral values. A story where they team up to stop a group of super - villains who are trying to undermine the city. Captain America could teach Spider - Man about leadership and making tough decisions.
One new character could be an alien who crash - lands near New York. This alien is initially seen as a threat, but Peter discovers that the alien is actually on the run from a more powerful and evil alien race. Peter decides to help the alien, and in the process, he learns some new combat techniques from the alien's unique physiology. This could add a whole new dimension to the Spider - Man Homecoming sequel fanfiction.
One great storyline could be MJ finding out about Peter's Spider - Man identity in a really unexpected way, like she accidentally stumbles upon his suit while looking for something in his room. Another could be them going on a double - date where Peter has to balance his normal self and his superhero duties during the date.
One aspect of Flash Thompson in Spider - Man: Homecoming fanfiction could be his relationship with the other characters. He may have a complex relationship with Ned Leeds, for instance. They could start off as rivals but then find common ground. And his perception of Spider - Man could change gradually, from envy to admiration, which would add depth to the fanfiction story.
A fanfiction could explore Karen's origin story in the context of the Spider - Man Homecoming universe. For example, it could be revealed that she was created by Tony Stark as part of a secret project specifically for Peter. The story could detail how she was programmed and what her initial purpose was, and how that purpose evolved as she interacted with Peter.
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.
There are many interesting aspects in Spider - Man Homecoming fanfiction related to'school watch'. For example, in some fanfictions, the school watch could be a group of students who keep an eye on any strange activities around the school, which might be related to Spider - Man's secret identity or some villains' plans. It could add an extra layer of mystery and drama to the story.
In a Spider - Man Homecoming Flash fanfiction, Flash could start as the typical bully. But one day, while being chased by some street thugs, Spider - Man saves him. Flash realizes that there's more to the world than just being popular at school. He begins to secretly admire Spider - Man and tries to change his ways. He starts to stand up for the weaker students, inspired by the heroism he witnessed. Eventually, he might even become an unexpected ally to Spider - Man, using his knowledge of the school and its students to help Spider - Man keep an eye on any potential threats.