I have a..personal thought.
It'd be good to assume that if Jabbawockeez is returning, that means the Castle Theatre is to be used. If Galins true that theres a second show coming, what other locations could you use?
There is the Shrek theatre, the Animal Actors theatre, and the Waterworld Lagoon. I would assume that they wouldn't want to place two shows next to eachother, so that'd take out AA on location.
So that leaves Shrek and Waterworld. I can easily see Shrek used for some sort of film/actor show, but Waterworld would be the question to me, atleast; in that front.