NBA City, ESPN, and Planet Hollywood are tourist attractions...not sure that's what either CSS or those companies are really aiming for at this point.
Dave and Busters has looked at Orlando before, but from what I've heard has been gun shy because of the countless amounts of entertainment options. Chances are any Orlando D&B's wouldn't be downtown anyway. The company has a pretty lengthy record of opting for more suburban locations off major interstates.
For example the Nashville location is by the Grand Ol' Opry...about 10 miles from downtown. The Atlanta locations are on the interstates in Gwinnett and Marrieta north of downtown. The Charlotte location is in the suburb of Concord. Jacksonville's is about 10 miles south of downtown. They have put them in high tourist areas in downtowns of some cities...NYC in Times Square, Chicago, Dallas (where they started).
As a company they are very selective of location because of the overhead is so high. If I were a betting man, and if Orlando were to ever get a D&Bs it would be in Altamonte, Millenia, I-Drive, or LBV. I seriously doubt they'll ever consider downtown Orlando.