There is a "clause" that they have to wait for numbers of years to be allowed to open as a casino, but the owner would not wait and probably it is time saving if, as you will note he has a space besides and easier to build now with a license in the adjacent lot and either stand alone casino and guests goes to his hotel or move into the Showboat when the restraining clause expires in a couple of 5 years or less.

By building a casino adjacent - he quells prospective casino applicant the chance to get a license and crowd into competition down the line.