Well, they might be shocked at how much technology has advanced in the future depicted in the fanfiction. Maybe there are new types of elemental powers or different ways of training ninjas. It could also be that the relationships between characters have changed in unexpected ways, and they would have to come to terms with that.
They might gain a new perspective on their own abilities. If the future fanfiction shows ninjas with enhanced powers, the past characters could start to think about how they could develop their skills further. For example, if in the future they can combine elemental powers in new ways, the past ninjas might start experimenting.
Well, for the Avengers, it depends on the nature of the future shown. If the future is full of chaos and destruction, Captain America would likely feel a great sense of responsibility to prevent that from happening in their own time. He would start formulating plans and strategies right away. Black Widow, on the other hand, would be more cautious. She would analyze every detail of the future situation to figure out who the real threats are and how to neutralize them. Hulk might be confused and a bit scared at first, especially if the future technology seems like it could be used against him. But then he might see opportunities to use it for good, if he can get over his initial fear.
There could be a new tech - savvy kid who idolizes Hiro and wants to join the team. This character might bring in fresh ideas and a different perspective on using technology for good.
It could be about the team facing new, advanced threats in the future. Maybe a new villain emerges with technology far beyond what they've seen before, forcing them to upgrade their own gadgets and skills.
It's possible. Science fiction often explores future scenarios, and heroes in such stories could potentially represent the kind of heroes we might need or imagine in the future.
There was no past in the present, and no future in Bian Luohuan. This was because Bian Luohuan had traveled back in time to three years ago in the plot, exchanged his existence with Qi, created the present, and disappeared from the world. Yue Jin Chao had woken up three years ago and had no memories. This setting was based on the original game, the Legend of the Sword and Fairy 6. It was designed to save the world. The story of Bian Luohuan and Yue Qi was a karmic cycle. Their existence and choices were to deal with the Ming Lord. However, this information did not provide a specific explanation as to why Yue Jin did not have a past and Bian Luohuan did not have a future.
Another possibility is that the fanfiction explores the powers of the characters in a new light. Since they are in a different time period, they might have to use their quirks in unexpected ways. Maybe some quirks are more or less effective in the past compared to the present, and this creates new challenges and strategies for the heroes as they try to change the future.
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.