A great plot for a Spider - Man after Far From Home fanfiction could be that an alien race comes to Earth believing that Spider - Man is a threat to the universe because of the events in Far From Home. Peter has to prove his innocence while also protecting the Earth from this new threat. Along the way, he discovers new powers within himself and has to learn how to use them quickly. He also has to deal with the media frenzy that still surrounds him, and his relationships with his friends like Ned and MJ are put to the test as they try to help him in different ways.
Another interesting plot might be a love triangle between Peter, MJ, and a new character. This new character could be a fellow superhero or a civilian with some special abilities. It would add a whole new layer of drama to Peter's already complicated life as Spider - Man, and force him to make some tough choices about his relationships.
Perhaps in the fanfiction, Tony Stark had a secret plan for Spider - Man before his death. This plan gets revealed during the events of Far From Home and it changes the course of Peter's actions. He has to decide whether to follow Stark's plan completely or adapt it to his own style of heroism.
Some fanfictions might explore the multiverse aspect more. In a 'Spider - Man: Far From Home' fanfiction, Peter could accidentally cross into a different version of the Marvel Universe where things are very different. For instance, Tony Stark might still be alive but has become a villain, and Peter has to figure out how to deal with this new reality while still trying to get back to his own universe.
Well, generally it follows Spider - Man as he goes on adventures far from home. He has to face new villains and challenges in a different setting.
One idea could be that the Avengers secretly follow Peter Parker during his European trip in 'Far From Home'. They want to make sure he can handle the new threats on his own but end up having to step in at a crucial moment. Another could be that they get caught in the same illusions as Peter and have to fight their own mental battles while trying to protect the civilians.
One idea could be exploring Peter Parker's struggle to balance his normal high school life with his increased responsibilities as Spider - Man. Maybe he starts to get distracted in class more often because he's up all night patrolling the city.
A new villain could be someone from Oscorp who has been studying Spider - Man's powers and decides to create a super - soldier of their own to take him down. They might be a brilliant scientist who has a grudge against Spider - Man for some reason, like thinking he's a danger to the scientific community.
Spider - Man Far From Home is about Peter Parker going on a school trip to Europe. However, he gets drawn into a battle against new threats. Mysterio pretends to be a hero from another dimension but is actually a villain. Peter has to step up and use his powers to save the day while also dealing with the loss of Tony Stark and trying to have a normal teenage life.
Spider-Man: Far From Home follows Peter Parker as he tries to enjoy a vacation but ends up facing powerful threats. There's a lot of action, humor, and emotional moments as he grows as a hero.
One possible fanfiction could be that the Avengers watch Peter's adventures and are constantly making humorous comments. For example, Tony Stark might be joking about how Peter is handling the new tech in his suit during the movie. Another idea is that the Avengers are using it as a training video for new recruits, showing them how a young superhero like Peter can handle big threats.