One thought I had - Lamar Hunt applied for an expansion NFL team in the late 1950s, but the NFL didn’t want to expand because they feared they would “oversaturate” the product. He also tried to buy the Cardinals and they wouldn’t let him. Of course, he decided to tell the NFL to go fuck themselves, and he and a bunch of other rich dudes started the AFL, and the rest is history.
What if the NFL had decided, the hell with it, let’s give Lamar Hunt (and Bud Adams, whom Hunt roped in) teams in Dallas and Houston?