Awful idea.
First of all, Chicago is too damn cold to have a bowl game.
Second, Northwestern & Illinois played a game there a few years back and both teams went the same direction for all offensive plays because one of the endzones was too close to the outfield wall.
A Kickoff Classic between Pac12 & B1G in Soldier Field would be a decent idea, but a bowl game in Wrigley is just dumb.