First of all, it's hard to do more than 12 teams because after you get finished playing the other 6 teams in your 7-team division at the 14-level, you've got two conference game slots to rotate the other 7 teams through. If you have one yearly out-of-division rival -- let's say Alabama retained UT as its annual game -- you'd only play the other 6 teams twice every 12 years. Either that, or drop UT from the yearly schedule.
The real consideration here is not who fits best geographically, but who fits best economically. Of the other teams in the Southeast, the only ones that fit are Florida State, Miami, Clemson, Georgia Tech and Louisville. With the exception of Louisville, all are already in a major Div-IA conference, and Louisville can make an argument for the Big East.
Of the teams that would "move up" from a lower conference, only Louisville and Memphis have the facilities and have demonstrated fan support in multiple sports. Southern Miss draws 25,000 on a good day. Tulane is a shell of its former self and the conference doesn't need another Vanderbilt hanging around (heck, Tulane dropped its marching band a few years ago and I'm not sure it's back).
Louisiana Tech has some of the worst football facilities I've ever seen. Georgia Southern would be coming from an entirely different division. UAB has no fans at all.
Then, you have the issue of whether the current schools would approve this team or that team. The Mississippi schools, LSU and Alabama would shoot down Southern Miss in a heartbeat. Their economic profile doesn't warrant them getting a shot in the first place, and why invite another recruiting competitor? Same for Tulane (LSU, MSU, Arkansas), LaTech (Arkansas, LSU), Memphis (Arkansas, OM, UT) or one of the directional Florida schools.
I suspect, eventually, you might see Baylor drop out of the Big 12 and Arkansas go take their place. At that time, you could add a replacement for Arkansas. Also, in a twist, at that point the SEC would go from being buyer to seller. Without 12 teams, by NCAA bylaw you cannot have a championship game. The SEC would be leveraged against that fact.
Georgia Tech, Clemson or Louisville would likely get the first call from the SEC office, as they have the fan support, facilities and endowments the SEC crave. As many have mentioned, the "fix" there is to move Vanderbilt to the SEC West (they're already further west than Auburn is) and put the new team in the SEC East.
The real consideration here is not who fits best geographically, but who fits best economically. Of the other teams in the Southeast, the only ones that fit are Florida State, Miami, Clemson, Georgia Tech and Louisville. With the exception of Louisville, all are already in a major Div-IA conference, and Louisville can make an argument for the Big East.
Of the teams that would "move up" from a lower conference, only Louisville and Memphis have the facilities and have demonstrated fan support in multiple sports. Southern Miss draws 25,000 on a good day. Tulane is a shell of its former self and the conference doesn't need another Vanderbilt hanging around (heck, Tulane dropped its marching band a few years ago and I'm not sure it's back).
Louisiana Tech has some of the worst football facilities I've ever seen. Georgia Southern would be coming from an entirely different division. UAB has no fans at all.
Then, you have the issue of whether the current schools would approve this team or that team. The Mississippi schools, LSU and Alabama would shoot down Southern Miss in a heartbeat. Their economic profile doesn't warrant them getting a shot in the first place, and why invite another recruiting competitor? Same for Tulane (LSU, MSU, Arkansas), LaTech (Arkansas, LSU), Memphis (Arkansas, OM, UT) or one of the directional Florida schools.
I suspect, eventually, you might see Baylor drop out of the Big 12 and Arkansas go take their place. At that time, you could add a replacement for Arkansas. Also, in a twist, at that point the SEC would go from being buyer to seller. Without 12 teams, by NCAA bylaw you cannot have a championship game. The SEC would be leveraged against that fact.
Georgia Tech, Clemson or Louisville would likely get the first call from the SEC office, as they have the fan support, facilities and endowments the SEC crave. As many have mentioned, the "fix" there is to move Vanderbilt to the SEC West (they're already further west than Auburn is) and put the new team in the SEC East.