A really interesting plot twist could be that the time traveler discovers they are not actually traveling through time as they thought, but are in an alternate dimension that just mimics the Magi world's past. This throws everything they thought they knew into chaos and adds a whole new layer of mystery to the story. Another common one is when the time traveler is actually part of a grand plan in the Magi universe's history, and their time travel was pre - ordained to happen for a specific reason, like saving the world from a future disaster.
One common plot twist could be that Boruto travels back in time and accidentally changes something that has a huge impact on the future. For example, he might prevent a key event that led to the development of a certain jutsu, and then has to find a way to fix it before he returns to his own time. Another could be that when he travels back, he discovers a hidden truth about his family or the Hidden Leaf's past that was covered up.
One common plot twist could be that the Flight 19 crew discovers they are in a parallel universe instead of just a different time. Another might be that they meet their future selves during their time - traveling adventure. Maybe they find out that their disappearance in the original Flight 19 incident was actually part of a grander scheme to save the future.
One common plot twist could be that when they travel back in time, they accidentally change something that makes their present world very different. For example, they might prevent their first meeting, which then has a ripple effect on all their relationships and the whole Miraculous world. Another could be that they get stuck in a time loop where they keep repeating the same events in different time periods.
Well, a plot twist could be that when Sarada travels back in time, she finds out that her parents' relationship was not what she thought it was. Maybe she discovers that there were other forces at play that almost prevented them from getting together. Also, it's possible that she time - travels to a point where the Hidden Leaf Village is in a much different state than she knew, like being on the verge of a civil war due to some political intrigue that was long forgotten in her time.
Well, a frequent plot twist is when the time travel affects the relationships within Team Minato. Maybe they go back in time and realize they were wrong about someone. Or they accidentally change something in the past that makes one of their relationships turn sour. Also, they could find out that someone they thought was an enemy in their original time was actually a friend in the past, which is a huge revelation and changes the whole dynamic of the story.
A common plot twist in Naruto Rokudaime Hokage time travel fanfiction is that the time - traveling Hokage accidentally alters the fate of a major character. This could be someone like Naruto himself or Sasuke. By changing their past, the future of the ninja world is thrown into chaos. For example, if he prevents Naruto from getting a certain power - up in the past, it could mean that the ninja villages are not as united in the present. Or perhaps the Rokudaime Hokage's time travel causes a shift in the balance of power between the different ninja clans. This then leads to new rivalries and alliances that were not present in the original timeline.
One common plot twist could be that Naruto's time travel causes unexpected changes in the past that end up altering the future in ways he didn't anticipate. For example, his presence in the past with his EMS and Rinnegan powers might disrupt the normal flow of chakra development among the ninja clans. Another plot twist could be that the time travel is not a one - way trip, and he has to constantly battle against the forces that are trying to keep him in the past or prevent him from changing certain events. Also, he might discover that his own powers in the past are somehow connected to an ancient prophecy that no one in his original time knew about.
One common plot twist could be that Kagome's time travel alters the future in unexpected ways. For example, she might accidentally change something in the past that leads to a different relationship between Inu no Taisho and other characters. Another plot twist could be that her presence in the past is part of a grander scheme she was unaware of, like she was sent back in time by a powerful force to fulfill a prophecy. Also, she could find out that the Inu no Taisho she thought she knew has a hidden side or a secret mission that her time travel uncovers.
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.
One popular plot twist could be that Iroh 2 travels back in time and accidentally changes a small event that has huge consequences for the future. For example, he might stop a minor character from meeting someone, which then changes the entire course of a war. Another could be that when he travels to the future, he discovers that his actions in the past led to a dystopian world, and he has to find a way to fix it.