"This offers a VERY SCARY meaning to the title for The Sixth Installment: "Return of the Jedi"; what if Lucas wasn't talking about Luke Skywalker as the JEDI to return, but rather VADER---as he returns to the side of LIGHT at the END of the movie (see below); that would be the TRUE "return" of THE JEDI.

Whether Lucas admits it or not, he has remained true to his originial ideals, setting the frame work in the three most recent installments for numbers 7, 8 and 9: The Ressurection of SKYWALKER... his ascention as the most powerful JEDI of them all. "

Actually, Vader was originally supposed to die at the end of ANH. The "third installment" was going to focus on Luke, his sister (not Leia at this point), and finally meeting the Emperor in Episode 9. Lucas decided to wrap things up by showing Palps in ROTJ, and making Leia Luke's sister.