Luke could also go back to meet his father, Anakin, when he was still a young boy. He could be like a mentor to him, teaching him about the Force in a different way. This might prevent Anakin from ever turning to the dark side, which would rewrite the entire Star Wars story. He could introduce Anakin to different ways of using the Force that are more positive and less focused on power and control.
Another possibility is that Luke travels back to the time of the Old Republic. There, he could learn from the ancient Jedi and bring back their knowledge to the future. He might also discover secrets about the Force that were lost over time. This could make him an even more powerful Jedi in his own time, and he could use this knowledge to strengthen the Jedi Order and protect the galaxy from future threats.
One interesting aspect could be that Luke goes back to a time when the Sith were just emerging. He could try to root out the Sith threat before it became as powerful as it did. He might have to be very careful not to disrupt the timeline too much, but his Jedi wisdom could be a great asset in this time - traveling adventure.
Well, he might prevent some of the villains from ever becoming powerful. For example, he could stop Frieza from getting all those power - ups.
In the 'Petunia Goes Back in Time' fanfiction, she might try to change things that happened in the past. Maybe she wants to fix a mistake or prevent a bad event from occurring.
In this kind of fanfiction, Jotaro might change some crucial events. For example, he could prevent some of his friends from getting hurt or even stop the main villain from starting their evil plans at an earlier stage. This would completely change the original story's timeline and create a whole new set of adventures and challenges for Jotaro and the other characters.
He might change the course of some major battles. For example, he could prevent the destruction of certain planets that were destroyed in the original timeline.
One possibility is that Draco could try to change his family's fate. In the original story, his family was on the wrong side of the wizarding war. By going back in time, he might attempt to steer them towards a more positive path, perhaps by preventing them from getting involved with Voldemort in the first place.
She might meet some interesting characters from that era. Maybe she'll run into some early vampires or humans with unique stories. It could be a whole new adventure for her, different from her normal experiences in the present time in the Twilight universe.
Well, she might meet historical figures. For example, she could encounter Cleopatra and have an interesting conversation about ancient Egyptian politics and culture.
In this fanfiction, Gohan might change important events in the past. For example, he could prevent certain villains from getting stronger or save characters who died previously.
In this fanfiction, Nero might change historical events. For example, he could prevent certain disasters or alter the fates of key characters. Maybe he'll meet his ancestors and learn secrets about his family's past.