Texas, OU, OSU, TTech are already committed to join the Pac 10. Big 10 is not in the equation, despite other rumors you may have heard. These 4 schools are united in this particular move.
TAMU is strongly considering the SEC. The other schools oppose this for several reasons - one, recruiting in the state, and two, rivalries.
The statement was made that IF TAMU goes SEC, the other schools will react by NEVER scheduling TAMU in any sport going forward.
We're talking TAMU never playing Texas, OU, OSU, or TTech in any sport for the foreseeable future.