Although Cuban's remarks may seem far-fetched, football wouldn't be the first sport to experience a drastic popularity decline. It happened to baseball and boxing.

Mark Cuban said the NFL is making a mistake by valuing television money over the convenience of fans who are used to planning for their NFL teams to play on Sundays with occasional Monday night games. He compared it to the decline in popularity of "Who Wants to Be a Millionaire" after the game show expanded to air five days a week.

"They put it on every night," Cuban said. "Not 100 percent analogous, but they handled it the same. I'm just telling you, pigs get fat, hogs get slaughtered."