I wouldn't bet on that.
The actual story of KotOR had Revan having already been a Jedi who fell and became Sith in the backstory, but now had had his mind wiped and thus had the chance to choose again. I would assume that what we're more likely to get is the previously-canon version, which is that he chose to return to being a Jedi, and thus will be light side.
For what it's worth, even if they do any sort of dark side version of him, don't bet on the Triumvrate or Visas having anything to do with it. Revan is KotOR 1, they're KotOR 2, and there's no real connection between them in-story. The only character that's already in the game with a strong connection to Revan is HK-47, who was his personal assassin droid.
