timdiggerm said:
It's pretty clear from the way that Vader looks at the Emperor, looks at Luke, looks at the Emperor, looks at Luke, and then yells "NOOOOOO" that he's in it to save Luke.
Yes, it's the NOOOoooOOO what clinches it. For years, I wondered what could possibly be going on in his head. Maybe he twitched... Maybe he fell asleep and was startling awake. With that helmet on, it's really hard to tell his emotional state.
I never liked RotJ because the ending was so confusing! WHAT IS VADER DOING? IT MAKES NO SENSE! I would tell myself. But now that he says NOOOoooOOOO! It made me pretty sure this is what is going on: He doesn't like what is happening. At least, I'm reasonably confident in that, now with the added NOOOoooOOOO and all.
However it still is the matter of some debate, as CatBus has illuminated. Perhaps in the next revision of RotJ, he will say:
Vader: I won't let you kill my son- you b$@#%! Nay- rather I will pick you up and throw you hence, into the heart of the space station which you love! Oh, the irony- that you have no heart, you life ruining cur, and should be thrown into a metal heart! Just like the one which you gave me- not to say you actually gave it to me, but by the events which you manipulated came into play the cybernetic heart which beats in my chest for the son which I now know means more to me than life! Have at thee!
(then he throws him into the shaft)
Vader(con't): There. It is over. He is ended. And, anon, I shall be as well. After six movies, I have redeemed myself. Verily, I have returned. And a Jedi I be, at last. Thus, ladies and gentleman, The Return of the Jedi.
Luke: You can't die!
Vader: Deny me not, my son. I enter now, with only my deeds and my name, into the great unknown. The undiscovered country.
Luke: Star Trek 6?
Vader: Tis a metaphor for death, my son.
Luke: Oh.
I think that would remove all doubt about some of the ambiguities. The NOOOoooOOOO helped, but this would really seal the deal. And, if it didn't... Ric Olié could be added to summarize the finale. Perhaps at the Ewok party. Or, perhaps, his force ghost can join the trio and he can explain it all then.