Not seen the last few movies, but know that Luke died?
So read the name of this movie and just saw the trailer. The laugh at the end... I read the last pages of this thread now, and of course it is the Emperor, but when I first heard the laugh at the end I immediately thought of Mark Hamill's Joker laugh. Didn't even consider the Emperor coming back.
Know it is completely idiotic of me, but for a second when I heard the laugh and compared that to the title I thought that Luke would come back as a deranged bad guy. Vader's son is picking up the mantle as Sith Joker. Which would have been all kinds of awesome.
But no. Meh.