Finally saw the truth myself. Play as the Republic, and you free Revan. Play as the Empire, you kill him... They can't kill Revan off like that!! But it does end the long standing debates *SPOILER* that Revan is male. You see his face, and a neat new outfit to boot.
Hmm, from my vast knowledge of Star Wars, I might be mistaken but forget about the "Mandalorian" looking mask, and concentrate on his clock. This seems like Darth Vindican, who was killed by his apprentice Darth Malgus in the Fall of Korriban. BUT, the lightsaber he's carrying is indeed Darth Revan's, the one he built after his memory was taken away. So not really sure. Although regarding the above comment saying there was a debate about whether Revan was male or female, when was that?! [link] It was always known Revan was male since he was married to Bastila Shan, and they had a son together.