The story surrounding the emperor of the Sith is very... vague. We know that it's quite possible Revan and Malik met this emperor- or atleast very highly plausible that they visited the Sith empire and then returned from unkown space.
Revan knowing that such a great danger existed shifted his motives from saving the republic from the mandalorians to conquering the republic in part to save it. To fortifty the republic under a more authoritative form of government, possible his own empire.
Or so that's what I gathered. Now apparently this emperor was the very same that led them to their new world from their battle with the Jedi. Using arcane rituals to keep him alive for all that time.
anyway- my connection I want to make is that the emperor of the sith that invaded the republic 300 years after revan goes back into unkown regions... is not the original Emperor but Revan.
It's just as out there as the emperor being, the original, who led the fallen sith to their homeworld to begin with.
The two reasons I say this may be true is because, there's so little information about the emperor. It could just be as easily, an unkown figure we haven't met yet, but if it's the case of, "A story yet to be fleshed out," You'd think we'd atleast have a name. But we don't even have that- just that he's male.
So my thinking is Revan goes back and takes his place for whatever reason.
The second reason is that- once the Sith make the single greatest advancement on the republic in galactic history- the emperor walks away; leaving everything to the Dark Council. When has a Sith ever walked away from power?
I'm not filling in the details by any means, but it's plausible. I almost wished they wouldnt have finished Revans story, as I think the mystery for his character would've been better. IMO he's probably the best character in the EU, grand admiral thrawn being a distant second.
Any thoughts? I was also wondering what other people who are fans like about the character Revan? Please share