Well, they might prevent some great tragedies in the Star Wars universe. For example, they could stop Anakin from turning to the Dark Side. This would completely change the course of history in the galaxy.
The Sith, of course. Even in the past, the Sith would be a major threat. They might try to stop Luke and Rey from changing things that would be detrimental to their plans for galactic domination.
Their relationship might become more complex. Since they'd be in a different time, they might rely on each other more. In their own time, they had different paths, but going back in time could force them to be closer. They might start to see each other in a new light, like Luke seeing Leia as more of a partner in adventure rather than just a sister.
One common theme is self - discovery. When Rey travels back in time, she often learns more about herself, her powers, and her place in the galaxy. For example, she might find out about her family's past in a different era.
One common theme is redemption. For example, Rey might go back in time to redeem a character who has fallen to the dark side. Another theme is the exploration of 'what if' scenarios. Like what if Rey changed a certain event in the past, how would it affect the future of the Star Wars universe.
In certain Star Wars fanfictions, the idea of Luke being Rey's father has been explored. This can add an interesting new dimension to the story. It might be because of the way the Force works in the fanfiction universe, or perhaps to create a new family dynamic that wasn't present in the official movies. However, it's important to note that this is only in the realm of fan - created content and not part of the official Star Wars canon.
One key element is the discovery. Rey discovers Luke and often he represents a hope or a new path for her. It's like she's been searching for something and he's the key.
Yes, there might be some out there. Fanfiction websites often have a wide variety of stories. You could try searching on popular fanfic platforms like Archive of Our Own (AO3). However, the quality and nature of these fanfics can vary greatly.
One great 'rey travels back in time fanfiction' is 'Rey's Time - Journey Back'. It shows Rey going back to the days of the Old Republic and her adventures there. She meets some iconic Jedi and Sith and has to navigate through the complex politics of that era.
Well, I'm not sure of the exact titles, but you can start your search on fanfiction platforms like Archive of Our Own. Just type in'rey goes back in time' in the search bar and you'll likely find a bunch of fanfictions. Some might be about Rey going back to the days of the Jedi Order's prime and interacting with the great Jedi Masters of old, which could be really fascinating to read.