To expand upon:
You play the role of a dashing young lad who just happens to be force sensitive, You hear an echo within the force that almost deafens you. You go to find it out with a couple of friends you meet on the way. You get sidetracked on one planet, when you accidentely get involved in a space battle. For your part in it, the Exchange comes after you, with good or bad intentions, as does the Republic or the Sith. You could join either, and your choices affect you majorly.
Republic-Good
Sith-Bad
Exchange-Either
Needless to say, you shed your responsibilities, and travel to Mordor, so to speak. That's when the Aborigines come in.
As for the True Sith and a plot twist, give the developers at least 4 months of hardcore writing for that.