I suspect that a Significant amount went into that large building. With the size of that building, the wind loads on it would be tremendous during a hurricane. The normal outer columns would have to be significantly larger. They not only have to hold the vertical weight of the building but have to handle the lateral forces of the wind. Think large steel I beam used for a floor turned vertical. That a lot more money. Then you have to have all the lateral cross bracing to keep the building from racking (twisting in the wind.) Don't forget the concrete slab. I remembered Disney doing a time lapse video of the continuous pour of the concrete floor for the guardians building.
That foundation pour took 17 hours, with the help of 300 workers, and included 80 miles of rebar, 960 truckloads or 9260 cubic yards of concrete, and covered 72000 sq ft.
Just the cost of that concrete alone never mind the rebar would be over a million dollars. That's over 3 feet of concrete thick. To support all that weight, you would have to drive a lot of friction piles into the ground. That isn't cheep either.