Perhaps there's been some sort of miscommunication or misunderstanding among Peter and his friends. Maybe a villain has manipulated the situation in such a way that his friends now think Peter has betrayed them, so they've cut off all ties with him. This would create a very lonely and difficult situation for Peter in the fanfiction.
Fanfiction about Peter and MJ in the context of Spiderman and Spiderwoman often plays with different timelines and universes. For instance, there could be a fanfic set in an alternate universe where MJ has superpowers too. This would change the dynamics of their relationship completely. Writers can also explore how Peter and MJ interact with Spiderwoman in these fictional stories.
Peter's relationships can also be developed. His friends could come to visit him when he's sick. He might be more open with them about his insecurities as Spider - Man. And his enemies might take advantage of his weakened state, which forces him to grow and find new ways to defend himself even when he's not at his best.
Perhaps Peter is alone in a forest, away from the city. He's there to find some peace and quiet, to get away from the chaos of New York. While he's alone, he reflects on his powers and how they've both blessed and cursed him. He might even start to train in new ways, using the seclusion of the forest to his advantage.
One common theme is the theme of friendship. When Peter is sick, his friends like Ned and MJ are always there for him. They show loyalty and care, which is really heart - warming.
He might throw himself more into his superhero work. Since he has no friends to spend time with, he could use the extra time to patrol the city more often, stop more crimes, and focus on protecting the innocent.
In fanfiction, Peter Parker's scars as Spiderman could be a symbol of his battles and growth. They might be from fights with villains like the Green Goblin. Maybe a deep gash on his arm is a reminder of a narrow escape. Writers could use these scars to show his vulnerability and how he overcomes it each time he suits up as Spiderman.
One common theme is the exploration of their relationship. Since Peter has his double life as Spiderman, how that affects their relationship is often explored. For example, in many fanfictions, Michelle has to deal with Peter's sudden disappearances.
In Spiderman fanfiction, Peter showing off can be a complex thing. Sometimes it can be a character flaw, as it might lead to him getting into trouble. For example, if he shows off too much in front of a villain, it could give the villain an advantage. However, it can also be a positive aspect, like when he shows off to inspire other characters, such as younger superhero wannabes. It can also be a form of self - expression for Peter within the fan - created world, a way for him to assert his identity as Spider - man.
In some Spiderman fanfiction, Peter shows off by taking on multiple enemies at once and making it look easy. He might taunt the bad guys while fighting them, using his quick wit and banter. Also, he could show off his enhanced strength and agility by performing stunts that normal people can't, like leaping from building to building in a single bound or stopping a speeding vehicle with his bare hands.