Darth Vader Ghost or The Emperor ghost. I love these 2 bad guys, but lets have a an original bad guy (they can still be a Sith).
I'd like to take this one step further and say I don't want to see the Emperor at all (no clone/resurrection Legends BS) or Darth Vader at all (as the newest rumors claim).
I'd like to take this yet another step further and say that I don't want to see Sith at all. How is another Sith "new"?
What if they call him "Darth New"?
JEDIT: *mental note* consider Darth New for ROTR Vader