I'm not really sure of the formats for 12 team conferences, but everyone seems to want to say that you would have to group all preexisting rivalries in the same division, i.e. UM,OSU,MSU,PSU in the same division. However, if every team plays everyone in their division, that's only 5 games in conference. That leaves at least 3 more in-conference games; are these randomly chosen every year? If not, isn't it possible to put, say, OSU and UM in one division, and have UM play MSU and PSU from the other division every year as a protected rivalry? This isn't really inconceivable, because we already have protected rivalries with OSU and MSU.