Compound and Vision have 2 different owners.
The immediate replacement is going to be Fever. The party usually follows Kenny Flynn(inlikeflynn). The hip hop crowd will follow AG entertainment (112, Chocolate, Club Bleu, and probably a night at Fever.). That's the guy that actually owns Vision, Alex Gidewon.
Your right about the rules in Atlanta. The main one being no alcohol after 2:30. You can pour till4 OTP... and then the parking...
I still expect some other megas spot to open in the city.