One interesting plot could be Peter seeing a future where his friends are in danger and he has to figure out how to prevent it. He might struggle with whether to tell them or try to handle it alone.
In some fanfictions, Peter could see a future where his city is completely changed, either for the better or the worse. If it's for the worse, he'd be on a mission to change the course of events. He might have to team up with unlikely allies and use his wits to reverse the negative future he foresaw.
One possible plotline could be Naruto seeing a future where his friends are in great danger and he has to find a way to change the course of events. For example, he might see that Sasuke is about to be captured by a powerful enemy, so he starts training extra hard to be able to rescue him.
Peter is obviously one of the main characters since it's about him seeing the future. His friends, like Ned and MJ, often play important roles too. They could be the ones Peter is trying to protect or they could help him deal with the visions.
One interesting scenario could be Harry seeing the future of his friends. For example, he might see Hermione becoming a great witch leader in the future, leading important magical reforms. Another could be him seeing Ron's family growing and having many more generations of Weasleys. He could also see the future of Hogwarts, like new magical creatures being added to the curriculum or new spells being taught.
One interesting idea could be how the characters use their knowledge of the future to prevent disasters. For example, if Natsu knew that a powerful dark guild was going to attack Magnolia in the future, he might train harder or seek out new powers to stop it. Another idea could be the moral dilemmas that come with seeing the future. If Lucy saw that a friend would die in a future battle, would she try to change it even if it meant disrupting the natural order? And perhaps some fanfictions explore how seeing the future affects the relationships between the characters. Maybe Gray, who has always been a bit reserved, becomes more open and protective of his friends when he realizes what could happen to them in the future.
A really cool plot could be that Peter gets transported to a different time period in the adventures. He ends up in a medieval - like world where he has to learn the ways of the knights and use his modern - day knowledge, like basic science, to solve problems. He might also have to battle dragons and rescue a princess in this strange new world.
In some fanfictions, Harry might see ghosts that are related to his family's past that he didn't know about before. For example, he could see the ghost of a distant ancestor who was involved in a great magical mystery. The ghost could then lead Harry on a journey to uncover secrets about his family's true power and heritage. This would add a new layer to Harry's character development and his understanding of his place in the wizarding world.
In the 'everyone sees naruto's future fanfiction', it could be that they see Naruto's future self as being too powerful for his own good. He might be on a path that leads to him being isolated because of his strength. His friends then would strive to guide him onto a different path, one where he can still be strong but also maintain his relationships.
One interesting plot could be that in the alternate universe, Harry is sorted into Slytherin instead of Gryffindor. This would completely change his relationships and how he approaches magic. Another plot might be that Voldemort never became evil in this alternate universe, and they end up as allies. There could also be a plot where magic works completely differently, like spells are cast by thoughts alone rather than incantations.
One interesting plot could be Peter Parker using his newfound knowledge from his rebirth to prevent some major disasters that originally happened in the Spider - Man storylines. For example, he might be able to stop the death of a certain important character much earlier.
One possible plot could be Peter going on adventures with different characters from a group. For example, he might team up with various friends to solve a mystery that's threatening their world. Another could be Peter having a series of misadventures as he tries to get to know everyone better, like accidentally getting into comical misunderstandings with each person.