One implication is that it could explain Rey's extraordinary Force abilities from the start. Anakin was a very powerful Jedi, so if Rey is his reincarnation, it makes sense she'd have such a natural aptitude.
Yes, in some fanfictions, Rey is considered as Anakin's reincarnation. This idea often stems from the strong connection to the Force that both characters possess. There are fanfic writers who like to explore the concept of a spiritual or karmic cycle in the Star Wars universe, and this reincarnation theory is part of that exploration.
In this fanfiction, the plot could revolve around Rey being haunted by Anakin's presence in the Force. She starts to have dreams where he shows her different scenarios of his life. As she delves deeper into these visions, she uncovers a conspiracy within the Jedi Order that was related to Anakin's downfall. Rey then uses this knowledge to reform the Jedi in the present day, all while being inspired by Anakin's complex story.
Well, if Luke is Rey's father in Star Wars fanfiction, it would have a profound impact on Rey's character arc. Firstly, it would give her a more defined family origin, which was somewhat ambiguous in the official movies. Her connection to the Force could be seen as more hereditary, passed down from Luke. It could also lead to different interactions with the other characters. For example, her relationship with Leia would be that of aunt - niece. This would also change the way the fanfiction could explore the themes of family, destiny, and the Force. It might create new storylines where Rey has to come to terms with her father's past, his mistakes, and his achievements, all while forging her own path as a Jedi or whatever her role might be in the fan - created story.
One way to write it could be by having Rey discover old holocrons about Anakin. She could be in awe of his skills as a pilot and Jedi. She might start to mimic his fighting style and try to understand his fall to the dark side and subsequent redemption. This would create an interesting dynamic as she tries to learn from his journey.
In a fanfiction where Rey meets Anakin, one possibility is that Anakin would see Rey as a symbol of hope for the future of the Jedi. He might take it upon himself to train her in the ways of the Force more deeply, sharing his own experiences both good and bad. Maybe he would guide her in how to avoid the dark side's temptations that he himself succumbed to.
Well, there are several implications. For starters, it can completely change Rey's backstory. Instead of being an orphan with a mysterious past, she now has a direct connection to Mara. This could also affect her relationship with other characters. For example, how she interacts with Luke Skywalker might be different. Maybe Luke has some knowledge about Mara and Rey's connection. It could also open up new storylines about the Jedi and Sith, as Mara has her own history in that regard. And it might influence Rey's training and her understanding of the Force.
If Anakin won, it could have completely changed the fate of the galaxy. Maybe the Sith would have taken over completely and there would be no hope for the Jedi.
One idea could be that Anakin's spirit somehow guides Rey in her Jedi training. Maybe he appears to her in visions and imparts his unique knowledge of the Force, especially the more unorthodox aspects he learned during his time. Another plot could involve Rey finding an ancient artifact that was once connected to Anakin, and through it, she uncovers secrets about his past that help her in her fight against the new Sith threat.
The most obvious implication is the destruction of Obi - Wan's world. Obi - Wan would be devastated and likely turn all his efforts towards revenge. This would change his character from a calm and collected Jedi to a more vengeful figure.
A meeting between them could lead to a unification of different Jedi teachings. Anakin was trained in the old ways of the Jedi, and Rey has her own experiences with the Force in a more modern, post - Empire context. Their meeting could result in a new Jedi philosophy. Also, it might change the political situation in the galaxy. If Anakin, with his name and history, supported Rey, it could sway many planets to side with the Resistance or a new Jedi - led movement.