One scenario could be that Spider - Man fails to save his beloved Aunt May from a powerful villain. He arrives just a moment too late, and her death shatters him. This makes him question his abilities and his role as a hero, leading to a downward spiral where he becomes more reckless in his fights.
In some fanfictions, Peter might be killed by a time - traveling villain from the future. This villain has come back in time to prevent Peter from achieving something great in the future. So, he targets Peter at a vulnerable moment and kills him. This would create a ripple effect in the timeline and lead to a very different future for the Spider - Man universe.
In some fanfictions, Peter's death could be a result of a new and powerful villain. Maybe a super - strong and extremely intelligent foe who manages to outwit Peter and deliver a fatal blow. It could also be due to Peter sacrificing himself to save the city or his loved ones from a catastrophic event like a bomb or a collapsing building.
In certain fanfictions, Spider - Man sacrifices himself to save the city. He might face an enemy so powerful that the only way to stop them is by giving up his own life. This could be a very emotional and heroic end, with the city mourning the loss of their beloved hero while also remembering his great deeds.
One interesting story could be about Spider - Man teaming up with a new, unexpected ally. Maybe a villain who has a change of heart and decides to help him fight a greater evil in the fanfiction world. This would add a new dynamic to the usual Spider - Man battles.
One idea could be exploring a different origin story for Spider - Man in the fanfiction. Maybe he gets his powers from a scientific experiment gone wrong in a completely new way. For example, instead of being bitten by a radioactive spider, he could be exposed to a mutagenic serum that gives him spider - like abilities along with some unique side - effects that he has to deal with.
Writers should consider the impact on other characters. If Mary Jane witnesses Spider - Man's death, describe her heartbreak in detail. Maybe she falls to her knees, sobbing uncontrollably. The setting can also add to the memorability. A dark alleyway during a rainstorm, with lightning flashing as Spider - Man takes his last breath, can create a very dramatic scene.
In a fanfiction, perhaps Deadpool is mind - controlled and attacks Spider - Man. Spider - Man is hurt both physically and emotionally because he can't understand why his friend would turn on him. He tries to reason with Deadpool but to no avail, and in the process, he sustains several injuries that leave him in a very vulnerable state. This could explore themes of trust and betrayal.
One great fanfiction idea could be that Gwen discovers Peter's secret identity in a really unexpected way. Maybe she stumbles upon his Spider - Man suit while looking for something in his room. This would create a lot of drama and tension between them as she has to decide what to do with this knowledge.
One interesting storyline could be about how Spider - Man manages his relationships with different characters in the harem while still fighting crime. Maybe he has to balance his time between going on dates with his love interests and saving the city from villains.
One idea could be exploring the relationship between Spider - Man 2099 and other superheroes in the future. Maybe he teams up with a new group of heroes to fight a powerful villain who threatens the entire city.