I don't know. If a Duke, Stanford, Cal. Pitt, and Georgia Tech get the choice between being in a conference with us, Tulane, Syracuse, Wake Forrest, and Boston College or the Big 12, they will fall over themselves to get in the Big 12.
Again assuming the ACC loses more than 4 teams. If its just 4 the ACC will be fine. If its more the Big 12 will be in a good position.