One possible plot could be that Naruto from the past somehow gets a glimpse of the future of Konoha. He sees new threats emerging and starts training in ways that can counter those threats in the future. He might also try to influence the present actions of his friends and allies based on what he saw in the future.
In 'naruto the past watching the future fanfiction', it could be that Naruto's encounter with seeing the future is accidental. For example, he touches an ancient artifact during a mission that shows him visions of the future. He sees that his son Boruto is in some sort of trouble. So, he decides to leave behind some teachings or a special power for Boruto in the present. He also tries to change the relationship between the ninja clans in the present so that in the future, there won't be as much internal strife. He could also start training his students in a different way, focusing more on emotional and mental strength as he saw in the future that those aspects were crucial for ninjas.
One possible plot could be Naruto seeing a future where his friends are in danger. So, he starts training harder in the present to prevent that future from happening. He might see a powerful enemy that his friends can't defeat alone, and this knowledge gives him the motivation to gain new powers or improve his existing skills.
It could be a time - traveling enemy from the future who wants to stop Naruto from changing things. This antagonist might have his own motives for wanting the future to remain as it was, like having power over a ruined Konoha.
Well, one possibility could be that Naruto has some sort of visionary ability where he can see snippets of the future during his past adventures. For example, he might see the final battle against Kaguya while he's still on a mission with his team as a genin. This could change his approach to training and how he interacts with his friends, as he tries to prepare them for what's to come.
Perhaps the plot of this 'future Naruto goes to the past fanfic' is centered around Naruto's desire to reunite with his parents. In the future, he realizes that by going back in time, he could meet them when they were alive. So, he travels to the past. Once there, he not only gets to meet his parents but also tries to change some things in the past that would lead to a better future for the entire Hidden Leaf Village. He might use his knowledge of future threats to prepare the village earlier. He could also try to influence his younger self's relationships with other characters, like Sasuke. Maybe he tries to prevent Sasuke from leaving the village in the first place by showing him a vision of the future if he does leave. This would be a very emotional and action - packed plot, full of opportunities for character development and exciting twists.
There are quite a few things. For one, he could teach past Naruto about the deeper secrets of the Uzumaki clan. Since Future Naruto has explored more about his heritage. He could also give tips on handling the Kyuubi's chakra more smoothly. Maybe some new jutsu combinations that he discovered over the years. And not to forget, how to better read an opponent's moves during a fight, which is a skill he would have refined over time.
One possible plot twist could be that Naruto's love for Kakashi from the past disrupts the timeline. Maybe his feelings cause him to unknowingly change events that were supposed to happen. For example, he might prevent Kakashi from making a certain decision that was crucial in the original timeline.
Well, one possibility could be that they see a future where the village is in ruins. They then start to analyze what led to such a disaster and try to find ways in their present to prevent it. Maybe they see a powerful enemy they've never faced before and start devising strategies to counter it.
In the 'Fairy Tail Watching the Future' fanfiction, it might show the characters seeing a future with new magic that they don't understand. This could make them curious and eager to learn about it in the present. They could also see a future where relationships within the guild have shifted, like a couple that doesn't exist in the present time is formed in the future. This would surely stir up a lot of emotions and discussions among the guild members.
One possibility is that future Naruto could give past Naruto some advice on how to handle his relationships better. For example, with Sasuke. He might tell him to be more understanding and patient. Also, future Naruto could show past Naruto some of his new jutsu and inspire him to train harder to reach that level.
One possible plot could be Naruto going back in time with his red hair. Maybe he has new powers due to some future experiment. He could use his knowledge of the future to prevent certain tragedies in the past. For example, he might stop the Uchiha massacre. His red hair could be a sign of a new form or a side - effect of time travel. He would interact with his younger self and the other characters in a different way, leading to a whole new set of adventures and relationships in the Naruto world.