SilverWook said:
That would tie in with the old Bantha Tracks newsletter where someone let slip Beru was going to be in ROTJ. ;)
And we already know the Emperor can change both his voice and appearance, just by comparing ESB against ROTJ. I wasn't actually convinced when I wrote it at first, but now I'm pretty certain.
EDIT: And I'm pretty sure this is topical, in the sense that it fits the thread title of "Stuff that never happened in a Star Wars film".