Originally posted by tlbauerle
Actually...in the trailer I thought that was Hayden...wasn't it?
Hayden was in the trailer, but it was just for the trailer.
The dialogue heard in the teaser was actually the dialogue from the scene where Anakin recieves the name "Vader" in the Chancellor's office, shortly after the Mace duel.
The "suited Vader" effect was added just for the trailer, just so that it matched the imagary it accompanied.
It will just be Hayden's voice au naturel in the movie.
JEJ will probably provide suited Vader's few lines at the end of the movie.