Not speculating that is what will happen, nor do I have any information about plans for the BMG theater, but it is seemingly possible to build a house without removing the seats.
I've seen this done in a few places, most recently with one of the copycat traveling Van Gogh projection mapping exhibits that end in a large room. The one in Philadelphia was in a theater, and they built out such that the big room with the projections was half on the stage and half out to a platform into the audience. The platform supports were on the floor of the seating area and the platform's "floor" was on top of the seats themselves.
"All you see as you walk is carpeting, but what’s beneath that carpeting and the structure it covers are the same seats people sat in for decades to watch David Bowie, Prince and Bruce Springsteen perform. And when you’re in the VR lounge, look up. Just a couple of feet above your head is the unmistakable ceiling of the Tower Theater. You’ll recognize it immediately."
Again, I'm not saying that this will be a location for a house, just that it's relatively quick and dirty to build out from the stage without needing to remove seats.
/cue the responses - "Van Gogh house in the BMG theater CONFIRMED!"
