And going off of early production photos of Luke in the black outfit (especially ones showing Luke standing with Vader) had us guessing that a clone of a dark side Luke was 'the other'.

Also, a side note, I did feel strongly that when Lando looks over the buttons on Hans Carbon freeze unit, we were sure that he set a timer to free Han so he could escape Boba Fett.

That are some really cool ideas!

I don't know what documentary it was but it's so funny when Mark Hamill tells about the time the told him Leia was going to be his sister in the film. He was so disappointed because he was looking forward to some "serious snogging" with Carrie