Here's what i think should happen the KOTOR3 game.You should start out on some sith world in the unknown regions,in a prison(light side), or as a sith lord(dark side) as Revan.Light side- you have to break out of the prison and find a ship to fly you out to a world with the jedi(as the jedi have regrouped since KOTOR2).Dark side- you tell your army that you are leaving to the core worlds alone.You go to a planet with jedi.In there temple you should kill a few jedi.Both- then you go to the council chambers to either warn them(light side), or threten them(dark side).
Then the story shifts to the true main character, a young apprintice.You now permanantly take on this role. You start out with some training at first.Some things will happen(not realy sure
PS:There should be a way to choose a tottaly costamized voice talk for your character.