There is a line that those schools are not going to cross. Northwestern or Vanderbilt doesn't take the same "student" athletes that a Mississippi State takes. They compete based on their academic prestige, but they focus on a different type of recruit.
the reason I bring this up is that it is not a given that Duke wants to be in the same league as UConn and Pitt if the rest of the ACC is in tatters. And if a few of the top academic schools, such as Duke, Wake, BC, Villanova, Rice, Tulane, Navy, Army and Georgetown, said they were forming a league, there would be pressure on other schools of similar caliber to join. I strongly suspect ND would give the same "5 game" deal they gave the ACC. Those schools can still play big time athletics, but without the cesspool that is the SEC or most of the Big 10. I think Northwestern would join a league like that. I think they are only still in the Big 10 because of the money, and if they could find another home that was reasonable, they would leave in a heartbeat. Vanderbilt is less clear.
So with the understanding that football drives the bus, and the assumption that the major players will be paying players in an open market, you are convinced that a league made up of Duke, Wake Forest, BC, Villanova, Rice, Tulane, Navy, Army and Georgetown is "formidable" from a marketing standpoint?
