Dennis Dodd is
reporting that the Big 12's new TV deal will be announced any day now, and it will have an expansion clause. Apparently the theory that adding schools might bump the value up per school might not be true (though not sure if there will be look-ins or not, which could eventually bump the value up), but if the Big 12 expands to 12, the deals will go up by $40MM, so no current member will lose any money. This applies no matter who the Big 12 adds, whether they "add Appalachian State or Florida State."
Seems odd on the surface that the contract goes up no matter who is added, but it makes sense in that they obviously cant write into the contract, in black and white, "here's your ACC hunting license, go sick!" Right after denying expansion talk to make sure they don't get sued.
The TV folks probably trust the Big 12 not to do anything stupid, since the next contract would suffer.