Well, the plot could be centered around a prophecy. In the combined RWBY - Star Wars universe, there's a prophecy that a young, powerful warrior (Ruby) will either bring balance as a Jedi - like figure or plunge the universes into chaos as a Sith. The Sith, seeing an opportunity, manipulate Ruby into joining their ranks. Ruby starts to use her new Sith powers to rule over parts of Remnant. Her friends in RWBY form a resistance against her. Along the way, Ruby has to deal with her own inner demons as she realizes the true cost of the Sith power she wields. Eventually, she has to make a choice between the Sith path and her former self, which will determine the future of both RWBY and Star Wars universes.
The plot could start with Ruby being somehow transported to the Star Wars universe and being seduced by the Sith. Maybe she's lured by the promise of power to help her protect her loved ones better. As she becomes a Sith, she starts to change. Her appearance might take on a more menacing look, with darker clothing and a more intense glare. She then has to face her RWBY friends who come to the Star Wars universe to save her. There could be epic battles across different planets, like Tatooine or Coruscant, with Ruby using her Sith powers against her friends, who are trying to remind her of who she really is.
A possible plot is that in the RWBY world, an ancient Sith artifact is discovered. Ruby, being curious and always eager to gain more power to fight the Grimm, touches it. This causes her to be influenced by the Sith teachings. She then begins to turn against her friends in RWBY as she believes the Sith way is the only way to truly protect Remnant. The story could involve her trying to convert some of her friends to the Sith side, while others fight back. There could be a final showdown on a RWBY - like planet where Ruby, fully immersed in the Sith ideology, battles her closest friends in a fight for the fate of both universes.
One possible scenario could be Ruby's struggle with the dark side. As a Sith, she might initially be drawn to the power it offers. For example, she could use her newfound Sith abilities to fight Grimm more effectively in the RWBY universe. However, she would also face the internal conflict of losing her former self. Her friends in RWBY might try to bring her back from the dark side, similar to how characters in Star Wars try to redeem fallen Jedi or Sith. This could lead to intense battles and emotional confrontations within the story.
One possible plot could be Ezra being lured to the dark side by a mysterious Sith artifact. He starts to have visions of power and control that the Sith offer. As he delves deeper, he begins to distance himself from his friends in the Rebels, causing conflict within the group.
There could be a fanfiction where a former Sith, who has turned away from the dark side, returns to the Sith Temple to face his past. He has to confront the memories and the remaining Sith loyalists in the temple. Along the way, he discovers that there are some secrets in the temple that could be used to bring balance to the Force, if he can just figure out how to use them without falling back into the dark side.
It could be that Ruby has to deal with the consequences of a major decision she made in the past. This causes her to question her leadership skills and she embarks on a journey of self - discovery to become a better leader for her team.
The plot could involve Ruby finding a balloon that has strange powers. For instance, it might allow her to fly, which is something she doesn't normally do without her scythe's recoil. This new ability could change the way she approaches battles and exploration in the RWBY world.
The plot of Revenge of the Sith centers around the final stages of the Clone Wars and Anakin Skywalker's descent to the dark side. It's a complex and intense story with lots of action and drama.
Well, one possibility could be that Ruby gains a whole new level of guidance. Ozpin might introduce her to secrets of the world she never knew. Maybe he trains her in unique ways, using his vast knowledge and experience, which helps Ruby become an even more powerful huntress in the long run.
One possible plot could be that Ruby discovers Yamato in a strange new world or dimension within the RWBY universe. She has to figure out how to use it or control it while also facing the challenges that come with it, like other Grimm or villains being attracted to the power of Yamato.
One possible plot could be Ruby initially trying to hide her Grimm part from her friends. As she struggles with newfound abilities and instincts, she has to constantly fight the urge to give in to the Grimm side. Meanwhile, a powerful enemy emerges that she might be uniquely suited to defeat because of her Grimm part, but she has to first come to terms with it herself.
Well, it could be about Ruby struggling to hide her true nature as a Grimm Faunus while still being a Huntress. Maybe she has to deal with the prejudice from others who fear Grimm Faunus.