In some fanfictions, Ahsoka tries to redeem Darth Vader. She uses their shared memories and her Jedi teachings to reach out to the part of Anakin that still exists within Vader. It's a very emotional journey as she battles not only the Sith Lord but also the demons of their past relationship.
One scenario could be that Darth Vader discovers Ahsoka is still alive and is conflicted between his Sith loyalty and his past connection with her. He might secretly try to protect her from other threats in the Empire without revealing his identity.
A really exciting plotline might involve Ahsoka getting trapped in Vader's memories. She has to navigate through his past, seeing his fall to the dark side and his relationship with Anakin Skywalker. This could lead to some very emotional and thought - provoking moments as she tries to understand him better and perhaps find a way to save him.
One scenario could be Anakin, Ahsoka, and Padme working together on a diplomatic mission. They each bring their own skills - Anakin's combat abilities, Ahsoka's quick thinking, and Padme's political acumen. They face challenges like a separatist plot to undermine the mission, and through their combined efforts, they not only foil the plot but also strengthen their relationships. It shows how their different qualities can complement each other in a non - combat situation, which is not often explored in the official Star Wars storylines.
In a fanfiction, Darth Vader might finally face his past with Ahsoka. Maybe he would have moments of hesitation in their battles, as memories of their time as master and apprentice resurface. This could lead to an internal struggle within Vader, torn between the Dark Side and his former self.
One interesting scenario is that R2 uses its charm, if you can call it that for a droid, to make Vader question his loyalty to the Emperor. Since R2 was so close to Anakin, it could show Vader a side of himself that he has long forgotten, and this could make him start to doubt the Sith path he's on.
Well, a cool plot might be that Ahsoka gets trapped in a Sith - created illusion world by Vader. In this world, she has to face her past traumas and fears related to Anakin's fall. Meanwhile, Vader is conflicted as he watches her struggle, memories of his past with Ahsoka resurfacing. Or there could be a story where they both are on a mission to retrieve a powerful Jedi/Sith artifact, and their paths cross in a race against time.
In fanfiction, their duel could be more about psychological warfare. Ahsoka might use her knowledge of Anakin to try and get into Vader's head, making him question his loyalty to the dark side. For example, she could bring up memories of their time as master and apprentice. This would add a layer of complexity not always seen in the official duels.
A cool concept would be a crossover with the Star Trek universe. Darth Vader's Sith ideology would clash with the Federation's principles. He might be intrigued by the advanced technology of the Star Trek world, and there could be an epic battle between the power of the Force and the technology of the future. Or perhaps he'd form an unlikely alliance with some of the more morally ambiguous characters in Star Trek.
In some fanfiction, there could be a scenario where Leia discovers her connection to Darth Vader much earlier. Maybe she has a vision or some sort of Force - related encounter that reveals the truth. This would lead to a very different dynamic in the story as she grapples with this knowledge and how it affects her fight against the Empire. For example, she might try to reach out to the good in him, creating an internal struggle for Vader between his loyalty to the Emperor and his newfound connection to his daughter.
One interesting story could be about Darth Vader secretly having a change of heart during the events of Star Wars Rebels. Maybe he has a brief encounter with a Rebel that makes him question his loyalty to the Empire.
One interesting fanfiction could be about Darth Vader secretly having a moment of hesitation when facing a Rebel who reminds him of his past self. Maybe he lets the Rebel escape without the Emperor knowing. It adds a new layer of complexity to his character.