There is quite likely a torn ligament here, as well (the MPFL or medial patellofemoral ligament). We will see. If so, he could return in a few weeks (probably with a brace) but would likely need repair surgery in the off season. OTOH, he is more susceptible to a re-dislocation until then. Also, there is heightened chance of suffering damage to the articular cartilage with some long term implications. And his play style will be dramatically altered. So he might be done for the season if surgery is needed and opted for now vs. later.
Surgery is around 6 to 9 months recovery and rehab. I feel bad for the guy, especially if the MPFL is involved.