There is no way that this is a suprise to all involved, so I don't know why we would worry about that. The NBA, Maloofs and City feel they have the numbers worked out. This would not be the point in time for them to be guessing about what the city could put in to funding this thing.
I bet they had some ballpark numbers from the SOQ results and know what they will be able to get from the parking.
KJ has been two steps ahead of everyone on this. He's been playing this whole game with the cards close to his vest. No way he gets caught short this close to the goal.