One common theme is the corruption of power. Peter has great power as Spider - Man, and in these fanfics, that power often corrupts him. Another theme is the fall from grace. He goes from being a beloved hero to an evil figure. And there's also the theme of moral decay, as his values shift from good to bad.
I'm not sure of a specific 'Peter Parker is evil' fanfiction off the top of my head. But you could try searching on fanfiction websites like Archive of Our Own. There might be some works there that explore this dark concept of Peter Parker.
One popular 'evil peter parker fanfiction' could be 'The Dark Web of Peter Parker'. In this story, Peter's dark side emerges after a series of tragic events. Another might be 'Evil's Embrace: Peter Parker's Fall' where he is corrupted by a powerful, evil force. There's also 'Peter Parker: The Malevolent Alter Ego' which shows a different, more sinister side of him.
A plotline could involve Peter having a major falling out with his loved ones. For example, if he feels betrayed by his friends or Aunt May, he could turn evil. He might then use his knowledge of the superhero community to target other heroes and villains alike, causing chaos in the city. Another idea is that an outside force, like an alien symbiote or a powerful magic, could influence his mind and make him evil, leading to a series of events where he tries to reshape the world according to his now - twisted views.
His relationship with MJ would be completely shattered. Instead of being the loving boyfriend, he could become possessive or even abusive. His friends at school would be terrified of him. Ned, who was once his closest friend, would probably try to avoid him or even try to find a way to stop him. And his relationship with the Avengers would turn into enmity. They would see him as a threat and would try to contain or stop him.
One possible reason could be extreme grief. If he lost someone very close to him, like Aunt May in a particularly cruel way, it might shatter his moral compass. Another reason could be mind control. Maybe a powerful villain manages to get into his head and twist his thoughts and values. Also, if he was constantly betrayed by the people he trusted, such as the Avengers or his friends at school, he could gradually turn bitter and evil.
I'm not sure specifically about 'peter parker 5 1 fanfiction'. But there are many great Peter Parker fanfictions out there. You can try websites like Archive of Our Own. They have a vast collection of fan - made stories about Peter Parker that are really engaging.
Mary Jane Watson is often a common character. She might be Peter's love interest and support system as he navigates the complex Web of Life. Another one could be Aunt May, who provides the home - like and moral support to Peter. Also, villains like Doctor Octopus or Green Goblin can appear, as they often cross paths with Peter in his adventures related to the Web of Life.
It could be a vengeful criminal that Spider - Man has put away in the past. This criminal has spent years in prison plotting his revenge and finally gets the chance when Peter is vulnerable. Maybe he manages to ambush Peter in an alleyway while he's on his way home from school or work.
If the situation is more serious, Peter Parker would be very respectful. He would listen carefully to the president's requests and do his best to fulfill them. For example, if the president asks him to investigate a strange occurrence that seems to have super - power related elements, Peter would swing into action, reporting back to the president with all the details he has gathered, just like a real - life agent would do.