Originally Posted by
ChrisIII
Vader's castle of course appears in Rogue One, and it was a part of that draft...and of course, pretty much all the sequels and prequels have borrowed from earlier concepts that were deleted from the other films. (Coruscant, for instance, appears in some drafts of ROTJ, but under a different name).
A lot of the recent pictures of Snoke show him wearing a golden cloak; something that was originally intended for the Emperor in that draft.
Han's mission in the earlier draft isn't as much trying to escape from the Empire, or pay off Jabba the Hutt, but to actually enlist the help of his stepfather, who is a big name in the Empire. Now, some of the hints about the 'casino planet' seem to indicate that Leia, Finn, Poe and Rose go to the "Casino planet" Canto Bight to meet the Laura Dern character-an admiral of some kind-and get her fleet to help the fight against First Order.
This is all kind of speculation of course, really.