Thanks for the update and it does make sense. So basically the size for the house in the 2nd theater is 10,000 sq ft (based upon the whole soundstage being 20,000)? If that's the case, there should be ample room for a house. My concern would be the queue. It doesn't seem large enough for the HHN crowds. Maybe putting an original concept house, they definitely shouldn't put an IP like the speculated Scream.
I'm not sure who said this but they should put Alice in Wonderland 3D house in the Shrek Theater. They can utilize the existing lighting there.