Well, it could create a lot of chaos. Characters like Sakura might be really worried if she reads about a future where her loved ones are in danger. She would then try to find ways to prevent it from happening. And the whole village might get involved too, as they would be concerned about the future of their home and people. This could lead to new alliances and strategies within the Naruto universe.
They might be shocked. For example, Naruto himself, if he reads about future threats to the village in the fanfiction, he would probably start preparing immediately to protect his friends and the Hidden Leaf. It could change their present actions as they try to avoid bad futures or work towards good ones.
If Naruto characters read the future in a fanfic, it would be a really interesting concept. Naruto himself would be faced with the knowledge of things to come. He might see the fates of his friends and comrades. This could lead to him trying to train harder or change certain events. Sakura could also be affected. If she saw a future where she was still weak, she might strive to become stronger. And for the villains, like Pain, if he saw a future where his plans failed, he might come up with new and more devious strategies. All in all, it would completely disrupt the normal flow of events in the Naruto world within the fanfic.
Well, some characters might try to change the future they read. For example, Ichigo might see a future where his friends are in danger and immediately start training harder to prevent it. He's always been the type to take action.
They might be really surprised. For example, Naruto himself would probably be shocked to see some of the wild interpretations of his adventures. Some characters might find the fanfiction funny, while others could be offended if they are portrayed in a negative or inaccurate way.
In this fanfiction, Naruto might see a world where his friends' dreams have fully come true. For example, Sasuke could have achieved true peace in the ninja world in his own way. And Konoha might have advanced in technology, with new kinds of jutsus being developed that combine the old and the new.
Well, if Naruto travels to the future in fanfiction, he may encounter his descendants or versions of his friends that have changed a great deal. Maybe he would find that Konoha has evolved into a super - high - tech ninja village. He would need to learn about the new political situations, new enemies, and new ways of being a ninja. For example, he might have to deal with ninjas who can control artificial intelligence as their weapons. He would be confused at first but then use his determination and strong will to figure things out.
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.
Well, if Naruto saw the future in fanfiction, he might discover some dark secrets about his friends or family. This could make him question his relationships. For example, he might find out that a friend will turn against Konoha in the future. He'd then be in a dilemma of whether to trust his friend or take preventive measures.
He might get some insights into different possible futures for himself and his friends. It could be both inspiring and a bit disconcerting as he sees versions of events that may or may not come to pass.
He might be shocked by the advanced technology. There could be new forms of ninjutsu or combat styles. He would also have to adapt to a different social structure.
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.