Case Method and Case Studies. The latter are research tools that take a particular case from its beginning to its end. Case Method teaching, by contrast, takes the case from its start point to the point of decision and demands that the students make that decision. Typically, it then provides data on what was actually done and the consequences of the action taken.
Frankly, a good asynchronous discussion lends itself well to Case method teaching. The instructor in such a situation is really quite naturally in a facilitator role. I can also see it being used relatively easily in a synchronous mode. And, setteing the stage by downloading some sort of video presentation would be an easy fit. So, all in all, I see it as a promising tool with all the usual caveats about doing it well.

Cheers

JohnT