I'd personally like Revan to sacrifice himself nobly at the end of the game, for "the greater cause", seeing as that's kinda what he's (or I guess she, if you can choose these types of details again) all about. Even if s/he was Sith - because when s/he was initially the dark lord, s/he still had the bigger picture in mind, always. It would suit him/her well, methinks.
"Someone's gotta get tough,
or someone else is gonna cry"