I just looked up
the biggest TV markets, since that seems to be a major source of revenue. I'm surprised to find Tampa-St. Pete is 13th. That's two ABOVE Mpls-St. Paul.
The biggest one without a team is #19 - Orlando-Daytona Beach-Melbourne. I can't imagine the Marlins would be thrilled with that, but it makes some sense. Orlando could definitely build them a stadium, I would think.
And right after them is Portland, which has a pretty successful AAA team.
It's an interesting list. I think the smallest is Milwaukee at #35. New Orleans is #53. They'd make an interesting choice.
Right after that is Sacramento, who is about to lose a basketball team. (Which, BTW, is one ahead of St. Louis?)