I wonder what engine they would be using for the game? Ive got a feeling it may well be the Source engine, as a while back 3dRealms ordered a Cease and Desist to modders hoping to recreate some of the Duke3D levels in a fan project. Perhaps they would have recreated an experience too close to the retail copy by doing that?
Another possibility is of course the Prey engine (modified Doom3). Theres a good chance that given their experience with that engine they would prefer to work with it on more than one game.
Given the fact that many people are treating this as the second coming of christ I hope it lives up to the hype
Edit: Fixed some typos