I have no idea what conference ND will join, or if they even will. I still think though that as physical geography has become less of an issue, the "superconference(s)" that will emerge will not necessarily look like anything already in existence. I could definitely see a conference of, say: ND, Texas, OU, Michigan, Ohio St, UNC, Florida, Georgia, USC, UCLA, Cal, Stanford, and BYU emerge. Maybe Nebraska, Penn St, and others too. All those schools have the clout based on money, alumni, and national followings to be a force economically. The superconference may not be so much of an actual new conference, but more of a break from the ethically bankrupt NCAA. Those teams would all be able to play a national schedule, get tons of TV exposure, and be in population and recruiting hotspots. Yeah, the schedule would be brutal, but they would play playoff gameS! to advance their champion. Just for argument's sake, say those exact teams did join up, then they could have the neutral site playoff games in places like Phoenix, NY, Dallas, Houston, San Antonio, D.C., Miami, Charlotte, Nashville, New Orleans, St. Louis, KC, Chicago, Las Vegas, etc. for even MORE exposure in markets where they may not have existing teams. Recruits and fans would get to see them all over the country. I could see those schools giving a "F@!$ You" to the NCAA and doing it their own way. They could make rules like no more oversigning, no more offering scholarships before a recruit is even eligible, and you have to have a graduation rate of ____% to remain in it. And then if schools like Alabama (ok pretty much the entire SEC), the remaining remnants from the Big XII, ACC, and Pac-12 want to get on board and adhere to the requirements, then come on aboard. But screw up or cheat...and we're kicking you out.
Sorry for the rant. Just wanted to get that off my chest!