Well that's actually not the case, this is:
Does this mean the Emperor is coming back? Maybe, Hood also suggests the Emperor may be still alive in some sort of spiritual form. But if the Emperor does 'return' I don't think it will be in a corporeal form.
Here's a thought. What if Chapter 4 of the Sith Warrior storyline involved tracking down the scattered pieces of the Emperor's essence, which say, had attached themselves to the remaining Children? They could have the Jedi Knight story running parallel to it, or dealing with the effects of the Emperor's return...
the emperor's assumed body was destroyed. That would be the voice. The emperor's TRUE body is alive and well.