I'll believe a Big 12 Network when it happens. Unlike the Big 10 and the possiblity of the SEC launching their own network within 2 years, the Big 12 just doesn't have the eyeballs and TV sets needed to make a Big 12 network attractive to advertisers and to potential financial partners and has already been mention, the exisiting TV deals were recently extended for several more years.
The Big 10 has major TV markets of the Twin Cities, Milwaukee, Chicago, Cinncinnati, Cleveland, Detroit, Pittsburgh, Philadelphia.
Big 12 has Dallas, Houston, KC, St. Louis and the ever large metro areas of Waco, TX, Manhattan, KS, and no offense, Ames, IA. Denver could care less about the Buffs.