You're going to drop CU and Baylor, replacing them with Arkansas and TCU? Sports talk is really going downhill.
First of all, it would take an awful lot for Arkansas to leave the SEC. Secondly, TCU has trouble drawing 35,000 to games consistently. NU fans constantly degrade the fact that CU has trouble filling 54,000 seats, but they want to add a school that is essentially an afterthought in the DFW area? Also, you can bet UT and A&M would fight it all the way. They already left TCU behind, why would they change their minds now and bring TCU into the fold and immediately lose ground in the DFW area? Additionally, the Big 12 would drop the Denver TV market and not gain much in return (they already have the DFW market). Finally, NU fans are constantly complaining about how much power the South schools have, so they're going to add two more to the conference, including another Texas school?
To sum up, the sports talk guys that put this idea out there don't know what the **** they are talking about.