My bet on how they'll decide who lived and who didn't in KOTOR is through the infamous Atton Rand conversation.
4 options:
1. LS Revan Male
2. LS Revan Female
3. DS Revan Male
4. DS Revan Female
I think they'll probably just settle for the best possible endings in each one, ie. LS Revan Male, Bastila lives and is in love with Revan, DS Revan Female, Carth dies and Bastila is Revan's apprentice, etc.
Another thought: In the Malak/Bastila screenshot, Bastila is alos lightside. SHe's wearing her starting Jedi clothing, not the black Sith Robes Malak clothed her in. Both Malak and Bastila appear in lightside form.