In the fanfiction, their relationship might develop as they explore new places far from home. They could have conversations about their dreams, fears, and hopes. Maybe they discover a new hobby or interest together while they are away. This shared discovery can bring them closer. Also, if they face some misunderstandings and then resolve them, it would strengthen their relationship.
A really interesting plot might be that Peter and Michelle are separated from the rest of the group during a mission in a foreign country. They find themselves in a small, remote village where they discover a hidden ancient power. This power is being hunted by a secret organization. They have to protect it while also finding a way to contact their friends and get home. Along the way, they learn more about each other and their relationship deepens.
One great 'Peter Parker Far From Home' fanfiction is 'Spider - Man's New Adventure'. It continues the story after the movie events, with Peter facing a new villain that was secretly observing him during his European trip. The author does a great job of maintaining Peter's character, showing his growth from the movie.
In a fanfiction, MJ and Peter Parker could have an adventure that's separate from the main plot of Far From Home. For example, they could get lost in a small European town and have to rely on each other's skills to find their way back. MJ uses her intelligence to decipher clues, while Peter uses his Spidey - sense to avoid danger.
A prevalent theme is the protection of their relationship. In some fanfictions, villains target their relationship as a way to get to Peter. So, Peter has to find ways to protect MJ and their love while still being Spider - Man. It adds an element of drama and action to the stories. There are also stories that focus on their emotional growth as individuals within the relationship, like MJ becoming more confident and Peter learning to balance his personal and superhero life better.
The popularity of 'Peter Parker Far From Home' fanfiction lies in the love for the character of Peter Parker. Fans want to see more of his adventures. In the movie, there are so many aspects that can be explored further, like his relationships with his friends and his identity as Spider - Man.
Well, one possibility could be Peter dealing with the public's new perception of him after the events in 'Far From Home'. Maybe he has to face more scrutiny from the media or the government. He could also be exploring new powers or trying to master the ones he already has better. Another aspect could be his relationships, like with MJ, Ned, or even new characters he meets in the fanfiction.
Peter might develop more in his ability to balance his personal life and his Spiderman life because of Michelle. She could be the one who makes him realize that he can't just keep sacrificing his relationships for heroics. So he starts to be more present in their relationship.
There could be a new scientist who helps Peter with his web - shooter technology. Maybe this scientist has some secret knowledge about the symbiote or other aspects of Spider - Man's powers. Another new character could be a foreign exchange student at Peter's school who turns out to have some sort of superpower or connection to the superhero world. Or it could be a new villain's henchman who later has a change of heart and helps Peter.
You can try fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions, and you can simply search for 'Peter and MJ Far From Home' in the search bar. There are likely to be many well - written stories there.