After seeing the fan base stats in the NYT today---Louisville is screwed.
If you look athe the Demographics Nate Silver posted at the NYT today here are the top 6 teams not yet associated:
Notre Dame (The Whale) (768,000)
WVU (768,000)
Rutgers (768,000)
Kansas (768,000)
BYU (768,000)
UConn (768,000)
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Way down the list of available teams
Louisville (300,433)
This assumes the PAC-16 and Missouri to the SEC as #14.
That's based purely on estimated national fanbase not wealth or geography or accomplisments.