He might be shocked. In the fanfic, if he sees things like his friends' future achievements or the new threats that emerge, it would surely startle him. For example, if he discovers that one of his friends has a family of their own and has become a great leader in the village, he would be proud but also a bit surprised at how much has changed.
Naruto could be excited. If the future in the fanfic shows a more prosperous and peaceful Hidden Leaf Village, he would be overjoyed. He has always dreamed of a world where everyone is happy and safe. Also, seeing new generations of ninjas with unique abilities might make him eager to train with them or learn from them.
In the 'rwby reacts to the future fanfiction', RWBY might have a range of reactions. Ruby could be full of curiosity, eager to learn more about what the future holds for her and her friends. Weiss might initially be skeptical, analyzing every detail to see if it's plausible. Blake could be more reserved in her reactions, quietly taking in the information while being a bit wary. Yang, on the other hand, might be more vocal, either expressing her approval or her doubts loudly. They would all be influenced by their own personalities and experiences up to that point in the story.
The X - Men might have mixed reactions. Professor Xavier would likely be intrigued by the potential for better mutant - human relations in the future. However, Wolverine might be skeptical and on guard, fearing that the future holds new threats to mutants. He's always been the more cynical of the group. The different reactions among the Marvel characters would add a lot of depth and interesting plot points to the fanfiction.
He might be shocked. In fanfiction, the future could be full of strange twists. For example, if his friends' children are involved in some wild adventures that are very different from what he expects. He would probably be confused at first, then curious to understand how things got to that point.
With his usual determination. Naruto has always been one to face difficulties head - on. So, even if he's shocked by what he sees in the fanfic's future, he'll likely try to find solutions immediately.
They would probably be shocked. For example, Naruto might be amazed to see how the village develops further. He could be excited to see new generations of ninjas and the peace that his efforts have led to in the future. Sasuke might be more reserved in his reaction, but he would also be interested in seeing if his own actions had a long - term impact on the ninja world.
Some characters might be shocked. For example, Naruto himself. He has always been full of hope for the future and worked hard to build a better world. If he saw a future that was not as positive as he expected, he would be very disappointed at first. But then he would surely try to find a way to change it, because that's his nature.
In the 'hogwarts reacts to muggle stuff fanfic', the students and teachers might react in different ways. The younger students could be overly excited. They might see a muggle mobile phone and think it's some kind of magical communication device that muggles have invented without magic. They would be eager to play with it. However, the older students and teachers might be more cautious. They might be a bit worried about how these muggle things could potentially affect the wizarding world.
He might be really surprised. He would see all kinds of new interpretations of his world, his friends, and his adventures. Some fanfics could show him achieving even greater things in the future, which would make him feel proud. And if there are fanfics that explore his relationships in new ways, he'd be quite intrigued.
Sasuke could have a really unexpected reaction. If the fanfiction portrays a future where he and Naruto have a very different relationship than he expected, he could be completely thrown off. He might start to question his own actions and decisions. Also, Tsunade's reaction could be quite a shocker. If the fanfiction has her in a situation where she has to give up her position as Hokage in a way she didn't anticipate, she might get really angry at first but then start to consider the implications for the future of the village.
In Naruto future reaction fanfiction, characters might react to various things. For example, they could react to new jutsu developed in the future. They might be amazed at the power and creativity behind it. Maybe Naruto himself would be excited to see how the next generation has advanced the art of ninjutsu.