JB, since you are in the Disney travel business...what resort hotels look curiously booked up solid soon? Grand Floridian? Riviera? You know it's going to be a deluxe resort and you gotta know some regular Joe's family vacation reservation is about to be bumped somewhere else because of the NBA plan.
I wouldn't worry about that so much. Disney is actively trying to hack away at the number of bookings they have for the rest of the year as it is, so shutting down a couple of resorts for the NBA and MLS guys won't even leave a mark. They will NOT talk about a number, but best guess is they want to operate at no more than 30% capacity for the foreseeable future and everything they're doing right now is designed to encourage people to cancel. The guy who owns my agency says their ideal scenario is to re-open on July 11 with three people in line for Space Mountain in an otherwise empty park. He's prolly not wrong, although that's clearly an overstatement for effect.
To your specific question it looks like the NBA is probably going to take Coronado Springs Resort (upscale moderate with a ton of convention space for meetings and walk throughs ... a personal favorite of mine FWIW) and Contemporary Resort (also has convention space, but I'm thinking this is more for the league people while the teams "slum it" at Coronado Springs). I haven't seen specifics from the MLS people, but probably another entire resort would be set aside for them. I know more than I'm allowed to say, so I'll stick to speculation that I've seen elsewhere to avoid getting into trouble.