Perhaps Naruto travels back to a time when the Uchiha were at the height of their power. He then has to figure out how to deal with the Uchiha's more extreme members who are planning a coup. And in the process, he discovers a hidden connection between the Uchiha and an ancient evil that was long forgotten. This connection could change everything he thought he knew about the Uchiha and the ninja world in general.
A cool plot twist might be that when Sasuke travels back in time, he finds out that his actions in the future were actually part of a grand plan set by an ancient Uchiha. So, all his attempts to change things are just following the script that was already written. Also, he could time travel to a time when the Uchiha were at the height of their power and he has to deal with the jealousy and suspicion of other clans who see him as a threat because they know what the Uchiha will become in the future.
One popular plot twist could be Mito Uzumaki traveling back in time and accidentally changing the events that led to the Uzumaki clan's downfall. This could create a whole new set of challenges and opportunities for the characters in the Naruto universe.
One common plot twist is that Kurenai, instead of being a bystander in some historical events in the Naruto world, becomes a key figure in changing them during the time travel. For example, she might prevent a certain character's death that had a major impact on the original storyline. Another plot twist could be Naruto discovering a hidden power within himself only when he travels back in time, which was not accessible in his original timeline. And sometimes, the time travel itself is not a one - way trip, and there are complications in getting back to their original time, adding more suspense to the story.
A common plot twist is that during their time travel, they find out that they are fated to be together in a yaoi relationship in all timelines. So, they have to figure out how to make it work in the past while also dealing with the knowledge that they are from the future. It could also be that the time travel is caused by a powerful yaoi - themed magic or jutsu that has some unforeseen side effects, like making them more in tune with each other's emotions on a romantic level, which then leads to all kinds of interesting interactions and decisions as they navigate their past and future.
A really interesting plot twist in some fanfictions is that Naruto's time travel with the Rinnegan actually creates an alternate timeline. This means that the future he came from may no longer exist, and he has to deal with the new reality he's created. It often leads to complex storylines where Naruto has to decide whether to try and restore the original timeline or embrace the new one.
One popular plot twist could be that Naruto and Sasuke are forced to work together in a different way than in the original story due to some strange magic in the fanfiction. Maybe they have to switch powers for a while. Another could be that they discover a long - lost relative who changes their relationship dynamics. And a third might be that they are transported to a completely different dimension where they have to rely on each other more than ever to get back home.
Well, a cool plot twist in Gundam 00 time travel fanfiction could be when the time - traveling Gundam pilot discovers that the events they are trying to change are actually necessary for the future they come from. So, by trying to prevent something bad, they might end up making it worse. Also, there could be a plot twist where the time travel creates an alternate timeline where the Gundam 00 characters have completely different personalities. This would lead to really interesting interactions and power dynamics. And another one is that the time - traveler finds out that they are not the only one traveling through time, and there is a race against another time - traveler with opposing goals.
One popular plot twist could be that the characters travel back in time to prevent a major event that they thought was for the best in their original timeline, but in doing so, they create an even worse situation. For example, they stop the death of a villain which then leads to the destruction of many more lives. Another could be that time travel causes them to switch bodies with their past selves, leading to comical and also challenging situations as they try to adapt to their old selves' limitations and knowledge. A third one might be that the time travel is not as linear as they expected, and they end up in alternate timelines that have a completely different set of rules and characters, forcing them to re - evaluate everything they know.
One popular plot twist could be that the Konoha 12 travel back in time and accidentally change a major event that was supposed to happen. For example, they might prevent a key battle, which then has a ripple effect on the future they came from. Another could be that they find out one of their own is actually a time - traveler from an even further future, sent back to stop them from changing too much. And sometimes, they travel back and discover a hidden truth about their village's past that was covered up, like a secret alliance or a dark experiment.
In some Anduin time travel fanfiction, a plot twist could be that Anduin travels to a parallel timeline where everything is the same except for one key difference. Maybe in this timeline, his father, Varian, never died. This changes Anduin's whole perspective and he has to decide whether to try and bring this change back to his own timeline. It could also be that he time travels and meets an alternate version of himself who has very different values and goals, leading to an internal struggle for Anduin.