How will win the Superbowl?

All 4 teams have strong defenses and all 4 have had lapses during the season. The Bears and Steelers have offensive line problems and it remains to be seen if Sanchez and Cutler can continue to play at the current level or revert to turnovers. The Packers have enough defense to pressure Cutler and he doesn't react well to that. I think the Packers and Steelers will make it to the superbowl and I'd like to see the Packers win, but think the Steelers are more likely. At this point, no combination of the 4 remaining teams would surprise me though.