A large part of the justification for Darth Vader’s redemption is his appearance as a force ghost. Even though the new movie is not released yet, would it be possible for Palpatine to appear as a force ghost or can only Jedi do this?
Is there any support in the canon books/comics for this? One thing I can think of is Yoda’s reference to Obi Wan’s master in Phantom Menace, but I’m not sure who he is talking about and if it refers to Palpatine’s master or a Jedi?