It looks like after how well (well other than the transportation problems) the NYC/NJ Super Bowl went, owners of "cold weather" cities are going to make a push for more "cold weather" Suer Bowls.
The Hunts, Lourie, Krafts, Rooney's, Snyder, Halas, and Allen are all teaming up to get the SB at, at least one of their cities within the next 7 years, and to rotate through all the "cold weather cities". There is talk that they want every open "cold weather" stadium to get it. So Carolina, Nashville, Green Bay, Chicago, Buffalo, Boston, Philly, Washington, Pittsburgh, Denver, Kansas City, Seattle would all get one.
Their argument is the stadium and weather have much less effect on the entire proceedings and the atmosphere than the ability of the city to host and event.