If the SEC just invited Ohio State tomorrow I would assume they would accept and move over the SEC. Though Ohio State right now has it really good in the Big Ten they don't really have anyone to compete against other than Penn Stat every once in awhile or maybe Michigan if they are ever good again. For the Big Ten title it is basically Wisconsin, Nebraska or Minnesota in the other bracket. Neither of those three are really a challenge to them maybe once in a decade they would be but never consistently. If the alliance of the Big Ten and other conferences come together and force an automatic bid into the playoffs for their conference champions I don't see why Ohio State would move out of the Big Ten.