A possible plot is Anakin time - traveling to the Clone Wars era but with the knowledge of what will happen to the clones. He could try to change their fate, like finding a way to free them from the control of the inhibitor chips earlier. Or he might travel to a time during the Jedi Order's prime and learn different Jedi teachings that could have helped him resist the dark side. Also, he could time - travel to a time where he meets a younger version of himself and tries to guide his younger self towards a better path.
One idea could be Anakin traveling back in time to prevent his fall to the dark side. He could use his knowledge of the future to avoid the events that led him astray, like not trusting Palpatine. Another plot could involve him traveling to a time after his death and seeing the impact of his actions on the galaxy, which could be a moment of redemption for him. And perhaps he travels to a completely different era in the Star Wars universe and has to adapt to new cultures and powers while also dealing with his own inner turmoil.
Some fanfics might have Anakin time travel to a time when the Jedi Order was first founded. He could learn from the ancient Jedi teachings and bring that knowledge back to his own time to reform the Order. Or he could travel to a post - Galactic Empire era, seeing a galaxy that has either recovered or is still in chaos from his actions as Vader, which would be a huge motivation for him to go back and change things.
Well, Anakin might time travel to a crucial moment in the Galactic Republic's history, like the Trade Federation's blockade of Naboo. He could use his skills and future knowledge to prevent the events that led to so much chaos. He could also travel to a time where he meets his future children as a stranger and has to figure out how to interact with them without revealing his true identity, all while trying to change the course of his own dark future.
A more complex plot could be Anakin's encounter with a Sith artifact during the Clone Wars. He's tempted by its power, and it starts to influence his actions and thoughts. He has to struggle with this newfound temptation while still fighting in the war, which could foreshadow his fall to the dark side.
Another interesting plot is Luke traveling to the future. He discovers a galaxy in chaos due to a new, powerful dark force. He has to adapt to new technologies and new forms of the Force while also finding a way to defeat this new threat. He might meet descendants of his friends and foes, which would add an interesting dynamic.
A really interesting plot idea is the concept of a magical - Force hybrid power. In some fanfictions, characters like Harry Potter and Anakin Skywalker discover that their powers can be combined in unique ways. For example, using the Force to enhance spell - casting range or using magic to heal wounds that the Force couldn't fully heal on its 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.
A possible plot is that they go into hiding together. They find a remote planet where they think no one can find them. However, they soon realize that the dark side is still lurking. Maybe Palpatine somehow discovers their location and sends his minions to either bring Anakin back to the dark side or eliminate them. This would create a lot of tension and action in the fanfiction. Also, the story could show how their love for each other and their unborn child gives them the strength to fight back.
One idea could be Luke traveling back in time to the Clone Wars era. He could meet his father, Anakin Skywalker, before his fall to the Dark Side and try to prevent it. Maybe he uses his Jedi skills to influence Anakin in a positive way, like teaching him some advanced Jedi techniques that could strengthen his connection to the Light Side.
One idea could be Luke traveling back in time to the Clone Wars era. He could meet Anakin Skywalker before his fall to the Dark Side and try to change his fate. Maybe he'd use his knowledge of the future to prevent certain battles or alliances that led to the downfall of the Jedi Order.
A third idea could be the story of her preparing for the arrival of her child in a galaxy filled with danger. She might have to find a safe haven, deal with the political implications of having a child in her situation, and face the potential threats from the dark side who might see her child as a target or a tool.