I've also heard that it's going to be used for nominations, but my theory is that it's a place for the HoH to go to discuss game playing with another housemate, because I can see this Hell VS Heaven theme turning into a battle, similar to BBUSA. It also said on the C4 website before the launch "For those wanting a more private gossip there's even an enclosed seating area", which ties in with my theory even more.
