Yes, they have reconfigured that entire area completely, removing drainage canals and modifying the backstage road. As ever, I read your post and then went back and forth with one of the map acreage utilities. I think this is coming in at 3 acres at the most, which is epic in size. They will be able to put on quite a show in that thing.
(The mummy building is a 1.5 acre footprint at most)