A young street - smart kid from the Vegas slums who befriends Spider - Man and helps him navigate the seedy parts of the city that he's not familiar with. This kid could have dreams of leaving the slums and Spider - Man becomes an inspiration for him.
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.
A shadow - ninja character could be introduced. This character could be an anti - hero at first, with his own motives in the world of shadows, but later teams up with Spider - Man.
A new character could be an alien who crash - lands on Earth and has a connection to the technology that the Agents of Shield are researching. Spider - Man would be intrigued by this alien's abilities and the Agents of Shield would want to study it. This could lead to a story where they have to protect the alien from other forces who want to use it for their own evil purposes.
Penni Parker could be a great focus. In the movie, she doesn't get as much screen time as some of the others. Fanfiction could explore her backstory more, like how she became the SP//dr in her universe and what her daily life is like when she's not in the multiverse - saving action.
Perhaps a new character, like a genetically - engineered super - soldier gone wrong. This villain could have super strength and agility similar to Spider - Man, but with a more aggressive and unpredictable nature. He might see Spider - Man as a rival and be determined to prove that he is the superior one in the city.
It could be a mad scientist who creates mutated creatures to cause chaos in the city.
One character that could be added is a new love interest for Peter Parker. Maybe a scientist who works at Oscorp and has her own set of skills and secrets. Another could be a young mutant who looks up to Spider Man and wants to be his sidekick. This would add a new dynamic to the story as Spider Man has to train and protect the young mutant.
Well, there could be a new mentor figure for the reincarnated Spider Man. Maybe an old - time hero who has been around for centuries and has a lot of wisdom to pass on. This character could help the new Spider Man understand his powers and his purpose in this new life.
One underrated character is Peni Parker. In fanfiction, you could explore her relationship with her SP//dr suit in more depth. Maybe she has to deal with some glitches in the suit that are affecting her performance as a Spider - Hero. Another character could be Spider - Ham. You could write a story where he has to use his unique animal - based abilities to solve a mystery in the multiverse that the other Spider - People can't.
One interesting character could be Peter Parker's aunt. She often provides a grounding force in his life and her reactions to the new girl could add depth to the story. Another might be one of Spider - Man's villains, like Green Goblin. His presence can create conflict and tension in the fanfiction, especially if he targets the new girl to get to Spider - Man.