I need to remind you of a few things:
1) ND has a contract with NBC. If they were to join full time then the NBC deal would have to be incorporated into the ACC deal. This may be to the advantage of the ACC, as they get a second outlet to get exposure for their games
2) NBE has a contract with Fox. Fox would be loathe to give up a property like Georgetown, as they've already paid millions to sign up with them.
3) In whatever case, I'm sure that FSU, Clemson and maybe Georgia Tech/NC State/Louisville would have a say on who may join at this point. If UNC no longer run the conference like they used to that goes the same for Syracuse, who is a newbie.
With that said, I would be happy for you guys if you are admitted to the Big 12. This would mean that they know that they don't have a chance at poaching from a P5 conference and will simply take the best athletic programs available. I would say the same for the B1G and SEC, even though many will disagree with me on that.
I've made a little map:
http://www.mapyourlist.com/share/2voJo2ic4o