Then, on the Sith side, we have Emperor Palpatine, who was heavily teased to have some role in the upcoming story. Remember how the second Death Star was broken up on that planet, and the whole bit from earlier about how Sith can keep their essence within objects? Well, Palpatine may have been a flip-flopper and a bit of a coward, but make no mistake, he’s one of the most powerful Force wielders of this era.
Article source: https://www.cinemablend.com/news/2478464/star-wars-force-ghosts-how-the-rise-of-skywalker-may-use-them