Well, Anakin might time travel to a crucial moment in the Galactic Republic's history, like the Trade Federation's blockade of Naboo. He could use his skills and future knowledge to prevent the events that led to so much chaos. He could also travel to a time where he meets his future children as a stranger and has to figure out how to interact with them without revealing his true identity, all while trying to change the course of his own dark future.
One idea could be Anakin traveling back in time to prevent his fall to the dark side. He could use his knowledge of the future to avoid the events that led him astray, like not trusting Palpatine. Another plot could involve him traveling to a time after his death and seeing the impact of his actions on the galaxy, which could be a moment of redemption for him. And perhaps he travels to a completely different era in the Star Wars universe and has to adapt to new cultures and powers while also dealing with his own inner turmoil.
One idea could be that Anakin travels to a future where the Jedi Order has been rebuilt in a new and unexpected way. He might initially be confused by the different teachings and practices. For example, the new Jedi might have a more inclusive approach, accepting Force - users from all walks of life, not just those trained from a young age as in his time. This could lead to Anakin having to re - evaluate his own understanding of the Force and his place in the Jedi legacy.
Some fanfics might have Anakin time travel to a time when the Jedi Order was first founded. He could learn from the ancient Jedi teachings and bring that knowledge back to his own time to reform the Order. Or he could travel to a post - Galactic Empire era, seeing a galaxy that has either recovered or is still in chaos from his actions as Vader, which would be a huge motivation for him to go back and change things.
A possible plot is that Anakin is sent back in time and ends up meeting his mother again when she was younger. This encounter could give him a chance to save her from the Tusken Raiders, which might then have a profound impact on his emotional state and his path in the Force. He could also use this opportunity to train himself differently, perhaps learning from the Jedi of that era in a more positive way, without the strictures that later led to his disillusionment.
Maybe in the fanfic, Padme discovers a time - travel device and decides to use it to go back in time to when Anakin was still a young Jedi. She hopes to change the course of his life and prevent his turn to the dark side. Luke and Leia, sensing something is wrong with the timeline, follow her. Once there, they have to navigate the complex politics and relationships of that era while also trying to keep their true identities a secret. This could lead to all sorts of interesting interactions and plot twists.
In some narusasu time travel fanfiction, Naruto might go back to the time when Orochimaru was first targeting Sasuke. He could then use his skills and knowledge to keep Sasuke safe and away from Orochimaru's influence. A different plot could be Sasuke traveling to a time when Naruto was ostracized as a child and being the one to support Naruto, which would change their relationship dynamic from the start. Also, they could travel to a time during a major battle and use their combined future knowledge to turn the tides in their favor.
One idea could be Madara traveling back to the era of the Sage of Six Paths. He could try to change the very foundation of ninjutsu, which would create a whole new timeline. Maybe he would attempt to gain the power of the Sage for himself much earlier in history.
One plot idea could be Naruino traveling back in time to prevent a great disaster in their world. Maybe a powerful enemy once defeated them in the past, and by going back, they can change the outcome. Another could be traveling to the future to see how their actions in the present have affected the world. For example, they might find that their current choices led to a utopia or a dystopia.
One plot idea could be Arya traveling back in time to the days before her family's downfall. She could use her knowledge and skills to prevent certain events from happening. For example, she might stop Ned Stark from making some of the political missteps that led to his execution. Another idea is Arya traveling to the future of Westeros. She could see the long - term consequences of the power struggles she was part of and try to change things in her own time. Maybe she'd witness a new dynasty rising or a great war that she could try to avert.
Maybe Chuck travels to the future and discovers that his actions in the present have led to a dystopian world. He then has to go back and make different choices to avoid that future. This could involve complex character development as he grapples with the knowledge of what might be.