I likey..options include 17th game played at neutral sites: Europe, Canada, Hawaii, Mexico and some US college stadiums:
London x2, Berlin and Dortmund (huge stadium), Montreal, Toronto, Vancouver, Honolulu, Mexico City x2 and college stadiums (highest bidders)
Orlando, Clemson, Nebraska, Oklahoma, Tenn, Alabama, Cal-Berkley, Oregon, come to mind...maybe the big house in Ann Arbor (100k+)
and/or perhaps the conf winners get to play their17th game at home each as well as a reward...cuz its all about the rich getting richer