My friend Dave Christoffers posted these very interesting videos for the new Disney attraction. Dave works in show control for Disney and participated in an article called, "Showtime-When do you need a show control system?" that Jim Janninck (who also worked on the Idol attraction) and I wrote some years ago.
The first video is a time lapse of the construction of the attraction:
This one (which is unfortunately by Entertainment Tonight) tells more about the show itself:
More info here.