Like Adam said, B1G Ten Football is already very popular, it is mostly about tryin to reach new markets and audicences to increase the brand value.
"Try to think less like a fan and more like a businessperson." - Adam R.
These 2 quotes are exactly what's wrong with college football. The fact that population/demographics (tv contracts) would ever be more important than geographic proximity and natural (future) or existing rivalries shows exactly where college football has been going and will continue to head.
My question is - is it necessary? Do schools like Mich, OSU, Nebraska, PSU not already recruit in the south? Has our brand of football (style of play, rivalries born from geographic proximity and cultural similarities) not provided a strong national brand of football with loyal followers? Have college football games not been nearly exciting enough in the 100+ years leading up to 1990 (before major changes started happening like PSU, the BCS, etc)? We didn't see great games, great bowls, great players and coaches? The NFL wasn't supplied with enough talent? WHY do we NEED these expansions? If I hear the money excuse one more time... it's a damn arms race that has no benefit to the fan of college football - more teams = fewer games against traditional opponents and fewer OOC games (making intraconference ranking even tougher for national ranking accuracy). I just don't see the benefit to us as fans or the schools themselves (the extra money received goes right toward new facilities and coaches, not towards making school cheaper for students or funding research).
However, I'll play the game. Looking at AAU, the only true options I see for teams we'll target to make 16 (and I hope to god it stops there) will be (ranked in order of a combination of preference for the BT and likelihood of it happening):
Georgia Tech
North Carolina
Virginia
Texas
Kansas
Notre Dame
I think GT and NC are natural extensions south from MD, with the obvious jump being passing over the state of VA. However, VA is already covered (population-wise) with MD being so close to DC. I wouldn't be surprised to see VA in there. GT gets a large population of Atlanta and directly competes with the SEC for GA recruits. North Carolina is a bball powerhouse, respected school, and in another state without a BT school and good recruiting and positive population shifts.
I put Texas above Kansas because of the brand and the state it would bring - there are Texas alums living ALL over that state and it is a very worthy brand ($$-wise). Kansas is terrible at football but a bball blueblood, but it is not in a population heavy state and the major metro area in it is already largely served by Nebraska alums. Not sure of the value. Notre Dame is not AAU and would be the only team the BT would consider based solely on its brand and national following (not just alums) - clearly NBC feels they ALONE are worth a good amount of money.
Other schools I could see the BT targeting might be Mizzou or Florida, but I cannot see either leaving the SEC at ALL. There really aren't any other schools on that AAU list that are remotely close to BT geographic location, deliver new populations, and have enough of a sports focus to warrant addition. Pitt? Colorado? I just don't see it. My guess is two from UNC, UVA, and GTech.