There were countless topics made on official swtor forums with people arguing over this - main concerns were whether Revan fell to the dark side or remained more kind of "grey jedi" and whether he survived the Foundry flashpoint and used force ability called: "Fold Space". These are all rumors of course, nothing confirmed BUT...
Let me give you a link to short interview that focuses on lore related questions:
Drew Karpyshyn - say whatever you want about him, but this man is a legend. The lead writer of Star Wars: Knights of the Old Republic and
Mass Effect 1. And of course the creator of Revan character. Also, an author of what I consider one of the greatest Star Wars books to be ever released - Darth Bane: Path of Destruction.
For three years he was working on Star Wars: The Old Republic, continuously contributing to it's storyline. Most recently he wrote an amazing novel called simply: "Revan". While according to me and many other fans it was a great read, some people reacted rather negatively to it and had very controversial opinions about the whole plot. Well, De gustibus non est disputandum.
Anyway, recently Drew retired from BioWare in order to be able to focus more on his own projects and to spend more time... golfing. Was his decision forunate or not that remains to be seen but as Drew put it: "However, I feel that?s an essential step for every creative artist to take at some point. It keeps us fresh, it keeps us energized."
You can share your personal view on this matter in the question poll.
Overall, Drew is a really nice guy (at least from what I hear, tbh I don't even personally know him ). But it seems that this opinion about him is rather accurate, because not many writers spend their free time answering theirs fans emails (and even those nasty ones written by haters!).
I emailed Drew Karpyshyn recently and asked him a few questions mainly related to lore (and I also got an answer to the ones related to Revan's final fate and his possible reappearance in the future!), so here you go, enjoy this exclusive set of Q&A:
I just recently finished SW:TOR (or rather completed my first character's storyline) and I have few questions and it would be great if you could find some time to answer them.
All right, so here it goes:
Q: Did Revan really fall to the dark side again? How come he wants to commit genocide and exterminate the whole race? And how is that possible that Republic is supporting him in doing so - it's against all principles that the jedi believe in. And there are jedi aboard the foundry, along with republic troops.
A: Revan always walked on the edge of light and dark, and being corrupted by the Emperor's presence for 300 years did push him over in that direction. However, that doesn't mean he can't be redeemed again later - remember, you never see him die; he just vanishes. We left that door open on purpose.
Q: After the Foundry encounter, Revan speaks the same line as Malak did during his demise on the Starforge. Is this some sort of homage to Malak or? If yes, it kind of confirms that he fell to the Dark Side.
A: It's more of an homage than proof of anything.
Q: Is there a chance that you will ever write another book related to Revan? For example about his childhood, how Kreia/Arren Kae found him and how he became a jedi. It would be great to find out more about him. We know that he came from the outer rim and that Revan was in fact not his real name (it was revealed in TOR: "Revan - it is not my real name, it never was, but it will do).
A: Nothing planned right now, but you never know what the future holds.
For full interview head over to http://lorefreak.blogspot.com/
So, what do you think happened to him? :>