Well, like I said before, the "hype machine" as it stands are the various fans who now remain passive during the long development time and the active members in various forums / fansites. But like 3DRealms say, once DNF is announced and officially available for pre-order, there is no way you could not know about it! Then the media hype-machine goes into full swing, advertisements, posters, screenshots(?) these are all just assumptions...
But yeah, when it is announced, oh there will be hype. But I don’t really care about that stuff. I just want a game that is fun to play. Even if it’s just more of the same, Duke-wise, I’ll be a very happy bunny!