Another theme is growth. Naruto's growth from his past self to a more powerful and wiser version in the future is often explored. His past experiences, such as his battles and losses, fuel his development. And in many fanfictions, the watch aspect could refer to how other characters observe Naruto's journey. They might be inspired by his growth from a troublemaking kid to a great leader. There's also the theme of legacy. Naruto wants to leave a positive legacy based on his past. He wants to make sure that the future generations don't have to face the same hardships he did, like the constant threat of war and internal strife within the village.
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.
They often use flashbacks. For example, when Naruto is facing a tough situation in the future part of the story, a flashback to his past training with Jiraiya can give him the inspiration to overcome it. This way, the past is directly linked to the future.
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 way is through time - travel jutsu. A character could accidentally or intentionally use a jutsu that sends them to the future or past. For example, Naruto might find a hidden scroll with a time - travel jutsu and end up in the future where he sees how his friends and the village have changed. This could lead to interesting storylines where he tries to fix things or learn from the future.
In this fanfiction, it could also be about Naruto going back in time to learn from Kakashi. Since Kakashi was a great ninja in the past, Naruto might want to gain some skills or wisdom that he didn't have the chance to learn before. They could form a unique bond during this time, different from their relationship in Naruto's original timeline. Kakashi could be initially suspicious of this strange Naruto from the future but gradually come to trust and mentor him.
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.
One common theme is self - discovery. When Naruto from the past goes to the future, he often has to re - evaluate who he is in the context of this new world. Another theme is the impact of the past on the future. It shows how the actions and decisions made in the past can have far - reaching consequences.
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.
In such a fanfiction scenario, it can have a huge impact on the plot. Future Naruto has more experience and knowledge. He can train past Naruto in advanced techniques, like better control of the Nine - Tails' chakra. This could potentially change the course of battles in the past. For example, in the fight against Pain, past Naruto might be able to use new skills taught by his future self to win more easily. It also might change Naruto's relationships. If he becomes stronger faster, his friends might view him differently, and enemies might be more cautious.