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.
In this 'Naruto watching the future' fanfiction, Naruto could see a future where he has lost his way and become a villain. Horrified by this, he tries to understand what went wrong. He realizes that it was his thirst for power and lack of connection with his friends that led to this. So, he focuses on strengthening his bonds and using his power for good in the present to avoid that dark future.
Perhaps in the fanfiction, Naruto watches a future where the Hidden Leaf Village is destroyed. This shocks him deeply. He then begins to look into the events that lead to this destruction. He discovers that it's due to a rift between the different ninja clans in the village. So, he starts working on mending these relationships in the present to avoid the tragic future.
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 in the future fanfiction', perhaps Naruto has passed on his ninja way to a new generation. His son or disciple could be facing a new threat that combines old and new jutsu. Maybe they have to deal with a group that has found a way to use ancient, dark jutsu in a modern, technological world.
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.
Well, Naruto could see the future of his friends. Maybe he'd find out that one of his friends was going to face a great personal struggle. He could then try to be there for them in the present and offer his support, or even try to change the future to prevent the bad things from happening.
It could involve the characters seeing visions of a future where the Titans are finally eradicated. Maybe they see a world where humanity has rebuilt and is living in peace without the constant threat of Titans. For example, Eren might see a future where his friends are alive and happy, and this could change his actions in the present timeline.
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.
In this fanfiction, Naruto might look into the future and find out that the new generation of ninjas has lost their way. They no longer value the things he fought for, like friendship and hard work. So, he has to come up with a plan to inspire them again. He could start by sharing his own experiences and showing them the importance of the ninja way.
Another plot twist might be that Naruto reads a future where the entire ninja world is in ruins. This could lead him to take extreme measures in the present to prevent that future from happening. He might try to unite all the ninja villages in a way that has never been done before, facing many obstacles along the way as different villages have their own interests and grudges.
One possible plot twist could be that Naruto sees a future where his friends turn against him. This would shatter his world as he values his friendships deeply. He might then struggle to figure out what went wrong in the future and try to prevent it in the present.