Some Zuko time travel fanfictions involve him traveling to the future. In this scenario, he gets to see the world that has been rebuilt after the war. He might learn new bending techniques or ways of living and then take that knowledge back to his own time to help in the reconstruction of the Fire Nation.
One interesting Zuko OC pregnant fanfiction could be where the OC is from a different nation and their relationship with Zuko is a bit of a forbidden love. The pregnancy then adds a whole new layer of drama as they face opposition from different sides. It might explore how Zuko deals with becoming a father and the responsibilities that come with it.
One interesting RWBY time - travel fanfiction could be 'Back in Time at Beacon'. It often has the characters going back to their days at Beacon Academy and changing certain events. Another is 'Time - Twisted RWBY' where the time travel is more accidental and they have to figure out how to get back while dealing with altered timelines. And there's also 'RWBY: Through Time's Gate' which focuses on a magical gate that causes the time travel and the characters' adventures in different time periods.
One interesting Kushina time travel fanfiction could be where she travels back to prevent certain tragedies in the Naruto world. For example, she might go back to stop the Nine - Tails attack on Konoha. This would change the entire course of the story, saving many lives and altering the fates of characters like Naruto.
There might be a fanfiction where Sasuke travels to a time during the Fourth Great Ninja War but in an alternate timeline. He could interact with different versions of his friends and enemies. For example, he might meet a Naruto who has a different set of powers or a different personality because of the changes in the timeline. This would create a lot of interesting plot twists and character development.
One interesting Merthur time travel fanfiction could be 'Back to the Beginning'. It takes Merlin back in time to the day he first arrived in Camelot and he has to navigate his relationship with Arthur all over again, but this time with the knowledge he has from the future. Another great one might be 'Time's Twist' where Arthur travels to the future and sees how Merlin has been waiting for him for centuries. There's also 'Journey Through Time' which has both of them traveling through different eras of Camelot's history, changing things and facing the consequences.
One interesting Arthur Weasley time travel fanfiction could be where he travels back in time to prevent a major wizarding war from starting. He might use his knowledge of the future to change certain events and alliances. Maybe he teams up with some unexpected characters from the past and they work together to rewrite history for the better.
One interesting Naruto Shino time travel fanfiction could be where Shino travels back to the early days of the Hidden Leaf Village. In this story, he uses his knowledge of future events and his bug techniques to prevent certain disasters. He might team up with the younger versions of his friends like Naruto and Sasuke, and together they face new and old threats in a different way.
There are fanfictions where Sakura travels back in time and uses her medical knowledge in a more impactful way. She could start training earlier in medical ninjutsu and share her more advanced knowledge with the past versions of herself and other characters. This would not only enhance her own character but also potentially save more lives during battles.
A great 'Naruto evil time travel fanfiction' idea could be Naruto getting sent back in time due to a failed jutsu. Once in the past, he is filled with bitterness and resentment because of all the hardships he faced in his original timeline. This causes him to turn evil and he sets out to destroy the ninja villages that he once protected, using his future knowledge to plan elaborate attacks.
There might be a fanfiction where a person travels back to the time when Michael Jackson was creating an album. They become part of the creative process, maybe inspiring him in some small way or just observing his genius at work. This could show a different side of his artistry and how he was so meticulous in his music production.