And if I'm being realistic and honest...they ignore cold cities *with* domes considering the one off SB in Minneapolis and Indy for anything longer then a one off.
I legitimately think that by this point, the Super Bowl is a Sun Belt event no matter what - and the NFL usually throws a bone to cities that make a domed stadium in the north before going back to familiar ground, especially if, in the case of Sun Belt cities without domed stadiums, they're in tourist friendly places that can shoulder the load of the massively increased foot and commercial traffic of a Super Bowl. (Which, now that I write it out, is probably why they effectively cycle through the Sun Belt stadiums endlessly, considering most every city aside from maybe Phoenix already has mass amount of foot and commercial traffic coming into their cities during the time that the Super Bowl is on in the mid to late winter)
I wonder if the potential of a domed replacement stadium in Nashville for the Titans would be the one that breaks that general mindset for the NFL, considering it is an 'anomaly' in the Sun Belt (realistic opportunity for cold weather and even snow in the winter months) offset by the fact that it is a major destination for tourists and could easily shoulder the brunt of a Super Bowl week added on to that.