revan's story obviously hasnt ended yet due to his second disappearance so he can explain himself then. i doubt he would target the innocents. but its just speculation at this point.
I have a theory on what happened to Revan. Upon death, Force users usually explode in a flash of light. I believe this happened to Revan. In SWTOR beta, players could loot Revan. Then they complained that they didn't like that you could loot him. So I think they changed it so players wouldn't loot him. I'm betting Revan will appear as a Force ghost if my theory holds up.