Now don't get me wrong—the Saints are still a great team, but there are at least three other teams that can dethrone the World Champions: the Vikings, the Cowboys, and the Giants.
Now, the Giants are kind of the black sheep of this group since their team fell apart midseason, but their defense is really good.
They also have some really good depth, drafting some solid rookies such as Jason Pierre-Paul and Phillip Dillard.
It's kind of a stretch, but if Eli Manning finally puts together a full season of good play, they might be able to come back and make their way into the Super Bowl.
The Vikings will definitely come to seek revenge for their overtime loss in the Superdome. If Brett Favre comes back (see the next question), they are solid at almost every position. They even got stronger by drafting running back Toby Gerhart from Stanford.
If everybody stays healthy, the Vikings will definitely contend for the NFC Championship and even the Lombardi Trophy.
The Cowboys have become more solid in their receiving corps, drafting Dez Bryant out of Oklahoma State. The only thing keeping them out of the Super Bowl is their running game, which only consists of Felix Jones, Marion Barber, and Tashard Choice.
If they make a trade for a Emmitt Smith-like player (possibly Ronnie Brown from the Dolphins, which would take a lot that they might not be able to afford), they may be able to dethrone the Saints.