The lights are on
This game is supposed to be the bridge between Ezio's story and Desmond's story. Since AC1 they've been training Desmond, in the beginning of AC2 you realize Desmond is actually picking up some of the techniques, and you play his character for a short bit. With the glyphs in AC2 you also realize that the situation with Abstergo is starting to become more and more apparent. In ACB it's supposed to be even more so. I wouldn't say that after this we're going to Desmond's story, but ACB is definitely supposed to develop Desmond more and make him more than the medium we experience his ancestors in.