For a couple of decades the biggest inspiration was hints of the Los Angeles Bengals, Los Angeles Vikings, Los Angeles (full in name of team that wants to shake down the local taxpayers for a stadium). Just by not having a team in LA the NFL got quite a few stadiums. I’m surprised the ever let a team move in because the threat was far more profitable than actual teams. The Portland ____ wasn’t quite as scary. At the time, Portland was the second largest city without a nearby team. Now St. Louis is the biggest.
Yeah but St. Louis is a $hithole. Salt Lake City. If California had their act together, Sacramento could be a contender. Same deal with Portland for that reason.
Right now you could build in the suburbs of St. Louis. Or anywhere in Salt Lake City.

I believe they have the most lucrative stadium deal in the NFL. Even when there's a high school football game there, the Irsays get the money.