A great plot for a 'Spider - Man House of M' fanfiction could be that the House of M's reality - warping affects Spider - Man's powers in unexpected ways. His spider - sense could be enhanced to the point where he can predict not just immediate danger, but also long - term threats to the false world. He might then decide to use this power to find a way to reverse the House of M situation, all while facing off against those who want to maintain the false reality, including some powerful mutants.
One idea could be that Spider - Man discovers a hidden power within the House of M world that allows him to break the false reality. He could start seeing glitches in the altered world order and use his wits and newfound power to set things right. Maybe he teams up with some other characters who also sense that something is wrong.
Perhaps there's a fanfiction where Spider Man and Spider Gwen accidentally swap powers. They have to learn how to use each other's abilities to fight crime. This would lead to some really funny and also challenging situations as they get used to different ways of web - slinging and sensing danger.
One idea could be exploring the different Spider - People's home universes in more detail. For example, showing what Miles Morales' daily life in his universe was like before becoming Spider - Man. Another could be a team - up between Miles and an older, more experienced Spider - Person from a different universe to face a new and powerful villain.
A cool plot could involve a young Peter Parker from a universe where he got his powers much later in life. He ends up in the main Spider - Verse and has to learn quickly from Miles and the other Spider - People. They could all work together to stop a symbiote - like entity that is infecting different versions of Spider - Heroes. It would be interesting to see how this inexperienced Peter copes with the situation and how his different perspective might help solve the problem.
Maybe in the fanfiction, Spider - Gwen gets lost in the future where Spider - Man 2099 exists. He has to help her get back to her own time while also protecting his own version of New York from the chaos her presence might bring. They could learn from each other's fighting styles and develop a unique bond in the process.
One plot idea could be that Spider Man and Spider Woman team up to fight a new supervillain who has the power to manipulate time. They have to figure out how to work together while also dealing with the chaos the villain is causing in different timelines. Another could be a story where they get trapped in an alternate dimension and have to find a way back home while facing strange new enemies. Maybe there's a plot where they start to have feelings for each other but are afraid it will interfere with their superhero duties.
A great plot could be that Spider - Man retires and tries to live a normal life. But he realizes that the city he once protected is falling into chaos without him. He then decides to use his experience and wisdom rather than his powers at first. He forms a group of civilians to help clean up the streets and fight crime in a non - violent way. But eventually, he has to put on the suit one last time to face a major threat.
A great plot for Amazing Spider - Man fanfiction could be a time - travel story. Spider - Man could be sent back in time to the era when his powers first emerged. He could then use his knowledge of the future to prevent some of the tragedies that occurred in his past, like the death of Uncle Ben. Or, he could be sent to a future where New York has become a dystopia, and he has to find a way to fix it and return to his own time.
A plot could involve a fanfiction where Spider Man is shot by a mind - controlled civilian. This leads to a situation where he has to figure out how to stop the villain controlling the civilians without hurting them, all while recovering from the shot wound. He might also have to face public distrust as they see him as vulnerable now.
One interesting plot could be Cosmic Spider - Man traveling to different dimensions within the cosmos and encountering alternate versions of himself. This could lead to self - discovery and learning new powers.
One interesting plot idea could be Spider - Man teaming up with unexpected heroes from other universes. For example, he might work with a magical hero to fight a villain who has the ability to manipulate time. This would create a really cool dynamic as they combine their different skills and powers.