i have plenty of theory's into this, 1) its anyone under the mask and indeed it could be anyone. 2) as someones already said could be the emperor using his body or 3) its a clone and maybe even more than one of them. prior to the foundry Revan only wanted to destroy the empire now he wants to destroy the republic as well, this sounds a lil like clone insanity working its way in to the mind here and i believe each class gets a hint about whats to come from a mail in game after they have completed "Legacy of the Rakata" ... not too sure about that but it for sure seems like Revan's gone off the deepend somewhere... but there is some good news ... i get to kill him again XD