Sketching prospective divisions for expanded Big Ten and Pac-10

Which games fall into which category?
• Must be preserved at all costs: Ohio State-Michigan, Michigan-Michigan State, Indiana-Purdue (Old Oaken Bucket), Iowa-Minnesota (Floyd of Rosedale) and Wisconsin-Minnesota (Paul Bunyan’s Ax).
• We’re sure as heck going to try: Michigan-Minnesota (Little Brown Jug), Illinois-Northwestern (Land of Lincoln), Wisconsin-Iowa (Heartland Trophy) and Ohio State-Penn State.
• They’ll barely notice it’s gone: Penn State-Michigan State (Land Grant Trophy), Indiana-Michigan State (Old Brass Spittoon), Illinois-Ohio State (Illibuck), Purdue-Illinois (Purdue Cannon) and Penn State-Minnesota (Governor’s Victory Bell).