So the system worked:

1) Instead of an ugly eyesore of a building next to the Book-Cadillac, we have an attractive sinkhole.

2) The demolition was good for business. The street was pretty much closed off and some of the oldest eateries in Detroit had to shut their doors.

3) Thanks to not taking rash action to knock down a building, but by planning properly, this massive cleanup will cost the city much more in the end.

Win-win!