[TriggerGod]

Originally Posted by Commander Dimal

I'm also saying it's possible that Revan failed in his mission to stop the Sith since you see that they return in TOR.

Thanks for pointing out the obvious. If Revan had succeeded and destroyed the Sith Empire once and for all, then the main 'plot' (if thats what you want to call it) for TOR would be gone, and they (Bioware/EA) would have troubles doing it and making money off of it.