Originally Posted by Hallucination
^It's possible, but who agrees to take over the galaxy for a random dude?
Not just any random dude. This random dude would have been the true Dark Lord of the Sith and, in Revan's and Malak's minds, the one sole remainder of the Sith Order. This guy can and did bestow upon them the title of Sith Lords, and they likely returned to the galaxy with the idea of rebuilding the Sith Empire in mind.
Only little did they know that said random dude already had
an empire in waiting, Revan's being but a puppet empire paving the way for the true
Sith Empire's eventual return.