Who could be the main villain in a 'Star Wars Supergirl Crossover Fanfiction'?

One possible plot could be that Supergirl, through some sort of inter - dimensional rift, ends up in the Star Wars universe. She might team up with the Rebel Alliance. Her superpowers would be a great asset against the Empire. For example, she could easily take down Imperial starships with her heat vision or super strength. Maybe she'd have to learn to use a lightsaber too, which would be an interesting addition to her powerset.

Lex Luthor from Supergirl's world could be the villain. He could somehow find a way to travel to the wizarding world and team up with some dark wizards. He wants to use magic to enhance his power and take over both worlds. Supergirl and Harry Potter would have to stop his evil plans.

A natural choice for a main character could be Spartacus himself. Transplanted into the Star Wars universe, he could be a freedom fighter against the Empire. He could inspire the downtrodden species in the galaxy with his unwavering will for freedom. Another could be Anakin Skywalker. If he were to meet Spartacus, he might learn different perspectives on leadership and freedom. Spartacus could show Anakin that true power comes from the people, not from the Sith Lords.

Han Solo and Venom could be main characters. Han might initially see Venom as just another dangerous creature to avoid or make money from. But as the story progresses, they could end up teaming up against a common enemy, like the Hutts who might want to use Venom's power for their own evil purposes. And Chewbacca could also be involved, adding his strength and loyalty to the mix.

Darth Vader could be a great main antagonist. His power in the Force and his imposing presence would be a huge threat to The Flash. He could try to capture The Flash to study his speed abilities for the Empire.

Mr. Schuester from Glee could be a main character too. He could be the one who tries to bring the two groups together, seeing the potential in the Glee club and Supergirl working as a team. His role as a mentor in Glee could be extended to Supergirl as she tries to navigate the more complex aspects of human relationships and teamwork in this crossover fanfiction.

It could be an evil ninja from Naruto's world who somehow gains Kryptonian - like powers. He becomes power - hungry and decides to take over both the Naruto world and Supergirl's world. His knowledge of ninja techniques combined with super strength and other abilities would make him a formidable foe.

It could be a group of fallen Jedi. They turned to the dark side for various reasons, like power, revenge or disillusionment. As they were once Jedi, they know the temple's layout and weaknesses well, making them very dangerous villains in the attack.

It could be a new Sith Lord who is trying to finish what the previous Sith started. This villain might see the child as a threat to their plans of taking over the galaxy.

A new, self - aware droid created during the crossover event could be the main character. This droid could start out as a regular battle droid but then gain sentience and lead the droid army in a different direction. It could question the purpose of war and try to find a more peaceful solution for the droid army.