I would guess that they won't take ADRs after closing time to avoid any re-admittance issues. That does mean that there probably won't be a long "dinner" period to take advantage of. BUT it will also mean that Evening EMH will probably be very busy there.
I've heard that this restaurant will be in the Asian section...some reports have it in the same place where the Chakranadi Chicken Shop was. I think this would be on the way to Everest, but not sure.