It's be nice if they had a DLC/expansion pack that featured the Legion more. Unlike the NCR, it's pretty obvious that the Legion is never going to be in another Fallout game. And their such a interesting faction, it seems like they really deserve some more focus. Or a DLC that adds upgraded enemies to the wasteland like broken steel.

But like everyone said, it's probably just going to be the Special all-DLC-included version that's useless to people that bought the DLC's when they came out.