This is a bit OTT in my opinion. The handling of the whole relocation aspect has been a disgrace, but the tunnel club has hardly been kept a secret. As @Eccles Blue says, there are brochures available from City and there's a very detailed VR tour based on this video (which was widely publicised in the press in December).
I'm not sure what else you want or expect at the moment. It's just a glorified indoor bar and restaurant being built underneath the stand, so there probably isn't much to show at this stage. It'll just be a building site that looks like any other bar/restaurant under construction, and the last thing they'll want to do is underwhelm potential customers given the insane prices they're charging for it.
Spot on... how interesting are a load of photos of a half finished bar going to be?