Originally posted by Tangible God
Canonically, Revan is LS, and Bastila is redeemed.
That.
And there's no need to 'prove' it. If you take a look at Lucasarts history with video games where you join the Light Side or Dark Side, canonically it is going to go with the Light Side.
Take a look at Kyle Katarn. Jedi Outcast would be oodles different if Jedi Knight had been an official Dark Side ending, seeing as he would be incredibly evil and ruling the Remnant and fighting Luke instead of fighting alongside him and not ruling anything.
Same thing with Bastila in KOTOR2. If the Dark Side ending was official, she'd be dead as a doornail.
Except KotOR 2 goes off the two biggest endings, one of which was canonical.
You say Revan was a light side male? Then Bastila still has the hots for him, is alive, and talks to Carth.
You say Revan was a dark side male? Bastilia still has the hots for him, but you don't see Carth as he is still on the unknown world, (or DEAD if you were female.)