Until he is confirmed alive, he is dead.
No, until he is proven to be dead he is alive. In sci fi and comic books the number 1 rule regarding death is that if there isn't a body assume that they are alive, this will be no different.
Edit: In the beta Revan died and was lootable, they changed this for a reason. They are going to use him later on and my money is that he gets a rematch with Vitiate.