A possible plot is that Anakin is reborn in a way and Rey is the one who discovers him. She initially mistakes him for a normal person but then realizes who he really is. Together, they go on a journey to restore the Jedi Order. Anakin, with his past experiences, both good and bad, and Rey with her fresh perspective, combine their skills and knowledge. They face challenges from remnants of the Empire who fear the return of Anakin and the rise of Rey as a powerful 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.
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.
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.
One idea could be that Rey discovers she has a hidden connection to the Kenobi family. Maybe she finds an old Jedi artifact that was once Kenobi's and it unlocks memories or powers within her. Another plot could involve Rey traveling to a planet that was important to Kenobi and uncovering secrets there.
One plot idea could be Rey being tempted by the dark side and Sith teachings in a more psychological way. Maybe she starts having visions of past Sith Lords who try to convince her that the power they offer can help her protect the galaxy more effectively. Another could be a story where Rey discovers a hidden Sith artifact that has the power to either corrupt or be redeemed, and she has to make a choice about what to do with it. A third idea is that Rey has to face a new Sith threat that is related to her own past in some way, like a long - lost Sith relative or a Sith cult that was involved in her family's history.
A possible plot in Rey Skywalker fanfiction is that Rey discovers an ancient prophecy related to the Skywalkers that foretells a great danger to the galaxy. She then has to gather allies, both old and new, to prevent this catastrophe. Along the way, she might have to deal with her own self - doubts as she tries to figure out how being a Skywalker affects her role in this prophecy. She could also face internal struggles as she tries to balance her Skywalker heritage with her own unique identity as a former scavenger.
Perhaps a fanfiction where Anakin, as a Sith, is sent on a mission by Palpatine. But on this mission, he meets a young Force - sensitive who reminds him of his own past. This makes him start to have doubts about the Sith ways. He begins to secretly teach the young one about the Force in a more balanced way, all while trying to hide it from Palpatine.
One idea could be Rey being lured to the dark side by a powerful Sith artifact. Maybe she discovers an ancient Sith holocron that shows her a version of the galaxy where the dark side rules supreme and she starts to believe that it's the only way to bring true order. Another plot could involve Rey being manipulated by a dark side user who preys on her insecurities about her past and her power.
Maybe a story where Ahsoka has a premonition about Anakin's fall to the dark side. She tries to prevent it in secret, which leads to all sorts of dangerous situations and moral dilemmas as she struggles with whether to tell the Jedi Council or handle it on her own.
A third plot idea is that Anakin travels to different points in time during key battles in the Star Wars universe. He could use his skills to turn the tide of battles that were lost in the original timeline. For example, he could go back to the Clone Wars and help the Republic win a crucial battle, or he could jump forward in time to assist the Resistance against the First Order. His time - traveling abilities would make him a wild card in these battles, and his presence could rewrite history.
One idea could be Anakin as a Sith having to face his former Jedi allies. He might struggle with his new identity while still having remnants of his Jedi self. For example, he could be sent on a mission by the Sith to destroy a Jedi stronghold but find himself hesitating when he sees his old friends there.