NCAA Mega-Conferences

With the recent merging and blending of NCAA athletic conferences a thought crossed my mind: What would happen if there were just a few Mega-Conferences? Assuming that the mega-conferences would revolve around the existing major conferences I would suspect they would be the current Big-Ten, which is made up of midwest teams. The PAC-Ten, which is pacific/western located teams. The SEC, which is made up of schools located in the southeastern United States. The Big East, which is made up of teams in the eastern part of the country. Many schools in the country can be placed into one of these four conferences geographically. What would the conferences look like though?