I was looking over the C-USA schedule at their website and noticed a pair of games at Big 12 schools had television information that I was not previously aware. If those times hold firm, it actually makes the Big 12 early season selections relatively easy to figure out.
9/1: Tulsa at Iowa St. on FSN, time TBA
FOX's press release has a FSN game at 3:30pm ET that day with teams TBA, so it seems likely that it would be the time slot for Tulsa-Iowa St.. This would mean that ABC isn't taking either Marshall-WVU nor Wyoming-Texas since ABC & FSN have not coexisted in the 3:30pm slot previously and I'm not expecting that to change. Assuming that Wyoming-Texas airs on the Longhorn Network, Marshall-WVU fits into the 12pm F/X slot on FOX's release. I'm not anticipating FOX picking up any of the FCS vs. Big 12 games for national airing.
9/8: Rice at Kansas on FSN, 3:30pm ET
This one isn't 100% cut and dry, but it has been mentioned that the Longhorn Network could have as many as three football games in 2012, which would lead one to believe that the New Mexico game is one of those three games. Assuming that Miami (FL) at Kansas St. isn't selected by ABC, it will air in F/X's 12pm slot. Again, not anticipating the FCS vs. Big 12 games to be chosen.
9/15: Nothing selected, but...
FSN has two slots, F/X has one. Throwing out the FCS vs. Big 12 games. Texas is on the road, so the Longhorn Network is out. FOX has one timeslot and USC-Stanford is occupying it. Sounds like ABC would be an option for one Big 12 game. My guess would be TCU-Kansas since its the only conference game of the four. After that there's a pair of Sun Belt vs. Big 12 contests and the New Mexico-Texas Tech game. F/X's 12pm choice is probably whichever matchup has the most appealing Big 12 team of the three (OK State ??).