As much as I hate to say it I personally think it will be the Patriots taking it again this year. Although I would like to see either the Steelers or Jets take it. Packer's and Bear's won't even win the NFC.
Everybody is sleeping on the Ravens. They have the best group of receivers and the D is pretty good. A great all around running back and an experienced playoff QB. My prediction is Ravens vs. Bears in Dallas. Ravens win the Super Bowl.