One of the defining features of college football has always been the massive nonconference showdowns that capture national attention before league play even begins. Games like Texas Longhorns versus Ohio State Buckeyes are what separate college football from almost every other sport. Those matchups create playoff-level atmospheres in September and give fans regular-season games that feel monumental. Last season’s meeting between the No. 1 Longhorns and No. 3 Buckeyes was exactly that. Ohio State escaped with a 14-7 victory at home in one of the most-watched games of the regular season. The rematch this upcoming season in Austin is already one of the most anticipated games in the country. The problem is games like that may not exist much longer. Ohio State Buckeyes linebacker Arvell Reese (8) tackles Texas Longhorns quarterback Arch Manning (16).…