As I see it, the Jets and Ravens are not making the Super Bowl. Both have to take out the Steelers and Patriots on the road. Even if one gets to the Championship game, they are looking at another road game at either Pittsburgh or New England.
IMO, the Packers got the best chance. However, they are going to be in an incredibly difficult situation, having to win on the road against two teams that already beat them on their home turf this year.
-150 seems like a pretty good line. Packers COULD make the Super Bowl. But at -150, I think you can take the line. All 3 teams would have to win incredibly difficult road games twice.