The big 4 aren't looking at staying at 30 or 32. NFL expansion is already talked about. MLB expansion is pretty much a given in the next 10 years. NHL is adding another team and hasn't closed the door on Quebec, KC, and a few other locations. NBA expansion is a hot topic as well. 30-32 is just where things landed before TV money exploded. Now that TV money is going to move to "broadcast" money with streaming options as the primary driver. Once larger leagues, like the NFL, stop tying themselves to things like DirecTV, they're going to expand again to grab emerging metro areas to further expand their foothold.