According to "a film mole"..
I'm OK with it... As long as it doesn't in any way ruin his role in Return of the Jedi as the villain-father redemption. That scene was so powerful.
Oh, and also.. Don't, for the love of all that is Star Wars, use Hayden Christensen as Vader... Please don't Disney!
Call up James Earl Jones, if he is some sort of force-ghost, and use his voice. Now that would be awesome.