Well, perhaps the fanfic focuses on Naruto reading about his own future self. He could be shocked to see what kind of Hokage he becomes or the challenges he has to face in the future. This might make him question his current actions and strive to be better to shape that future in a positive way.
Maybe Naruto sees his friends in different situations in the future. For example, he might see Sasuke's future choices and how they affect the village.
In this fanfic, it could be that Naruto reads about future threats to the Hidden Leaf. He then tries to prevent them before they happen, which would lead to a lot of action-packed scenes as he prepares the village for what's to come.
It could be a new character that Naruto discovers through reading the future. Maybe someone who has a grudge against the Hidden Leaf and is planning a huge attack in the future.
Maybe in the fanfic, Naruto sees a future where Konoha is destroyed. This makes him determined to change the future. He could start by strengthening the village's defenses, forging new alliances, and also trying to figure out the root cause of the destruction in the future he saw. He might also try to uncover any hidden threats within the village that could lead to such a catastrophe.
In this fanfiction, Naruto might discover some unexpected events about his friends and the village. For example, he could see future threats and start preparing for them early.
One possible plot could be Naruto using the strategies from 'The Art of War' to outwit his opponents in the Chunin Exams. For example, he might use the concept of 'know your enemy' to analyze his opponents' fighting styles before the matches, giving him an edge in battle.
One possible plot could be that Naruto's appearance change to having red hair is a result of some new form or power he has acquired in the future. Maybe it's related to a new type of chakra or a special training he underwent. This new look might make his enemies underestimate or overestimate him, leading to interesting battles and strategic situations.
In a 'naruto x hinata future fanfic', the plot could be that Hinata discovers a long - lost technique in her clan's archives. Naruto wants to help her master it. But there are those who don't want this technique to be revived. So they face opposition from within the village as well as from outside. Their love and commitment to each other are tested as they fight for what they believe in and for the future of their family and the village.
Maybe Naruto sees himself as Hokage, with the village prosperous and peaceful. He could see his friends by his side, all having achieved their dreams too.
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.
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.
If Shirou reads about his future in a fanfic, he might initially be shocked. He could find out things about his relationships that he hadn't considered. For example, if the fanfic shows him in a relationship with a certain character that he currently has no feelings for, it could change how he views that character in his real life. On the other hand, if it shows a future where he fails at something important to him, it could either motivate him to avoid that fate or make him feel discouraged.