The sequel is already in the works, and could be out by late 2014 or early 2015. Peter Jackson has already signed on to direct the sequel.
Kathleen Kennedy recently told Collider, "It is being moved forward, in fact Steven and I were talking about it this morning. We're working on a script right now, we'll see a script probably February or March. If we can do some camera capture this summer, which I think we could do, then we would be on track to have the movie either Christmas 2014 or summer 2015, and so that's what we're looking at right now".