If you want to make it a 'newer' type of trophy game, have the media departments make a deal that the winner gets to refer to themselves as NU until the next game is played, and the loser has to refrain until their team wins. No trophy needed--just naming rights for one year.
This could be extended to such things as the media guide, where all prior references to NU for the loser would have to be scrubbed, all online references for active, university-controlled sites would have to be changed, and the like.