I've always said that I would have preferred AHiTR if it was just MC and Rae bouncing around spacetime. Like a lewd Doctor Who. Maybe they could pick up someone in trouble now and then, fix their problem and then drop them off again. If the game had taken this approach it could have gone on basically forever (ask the BBC) but with the way it's structured instead it'll be at least a few years yet. There are still significant parts of several of the Lis stories that need to play out (including Rae's) and then they all have to be tied together somehow before we get to the End.