The Nightsisters could make great villains. They have their own dark magic and could be after Starkiller for some reason, like wanting to use his power for their own dark rituals.
Starkiller is the central character in this story. He's likely to be a character with unique abilities and a significant role in the Star Wars universe.
Perhaps Starkiller discovers a long - lost Jedi power that was thought to be extinct. He then has to learn how to master it while being hunted by the Empire. This could involve him seeking out ancient Jedi holocrons for guidance.
Starkiller can be a game - changer in Star Wars crossover fanfiction. He can bring his combat skills and Force knowledge to new settings. For example, if he's in a crossover with the Matrix universe, his ability to sense and manipulate the Force could be compared to Neo's ability to control the Matrix.
Well, the theme of identity is quite common. Starkiller has a complex backstory and his true identity is often explored in fanfiction. Is he just a weapon, as the Sith intended, or can he become something more? Also, the theme of relationships is prevalent. Fanfictions look at his relationships with other characters like Juno Eclipse, Darth Vader, and other Jedi or Sith. For example, how his relationship with Juno might change his path or how his interactions with Vader shape his understanding of the Force.
He's often portrayed as a powerful and mysterious figure. Writers in fanfiction may show him using his Force abilities in creative ways that we don't see in the main Star Wars canon related to Star Wars Rebels. He could be a force for good, despite his past, and his presence might inspire the Rebels to take bolder actions against the Empire.
Well, Starkiller in Star Wars Rebels fanfiction can be seen as a sort of wildcard. His presence can completely shift the plot. He might be depicted as a mentor figure to some of the younger Rebels, teaching them about the Force in a different way than Jedi like Kanan. Fanfic writers like to play with his dark past and how he can either overcome it or be tempted back to the dark side within the context of the Rebels' fight for freedom.
One interesting aspect of Starkiller in Star Wars crossover fanfiction is the potential for him to interact with characters from other universes. For example, he could meet characters from the Star Trek universe. This would create a really cool dynamic as his Force - using abilities would contrast with the more technological - based powers in Star Trek.
Some Star Wars Starkiller Sith fanfiction focuses on the backstory of Starkiller. It might explore his early days before he became fully involved with the Sith. This could include his upbringing, his first encounters with the Force, and how he was initially recruited by the Sith. Maybe he had a family that was affected by the Sith's actions, which led him to be more vulnerable to their influence.
Power is a common theme. Darth Starkiller is often depicted as seeking more power, whether it's through the Force or political means. Another theme is redemption. Some fanfictions explore if he can turn away from the dark side. Also, the theme of identity is there. He's constantly trying to figure out who he really is in the context of the Star Wars universe.