It's not uncommon for the Super Bowl champion to come off a down year. For example, the Philadelphia Eagles went from 7-9 and out of the playoffs to 13-3 and Super Bowl champions in one year. For a more extreme example, the St. Louis Rams finished dead last in the NFC West at 4-12 before becoming the Greatest Show on Turf in 1999 and winning the Super Bowl over the Tennessee Titans.
While the teams at the top of the below power rankings may be considered the Super Bowl favorites at this current time, it wouldn't be shocking to see a team in the bottom half lift the Lombardi Trophy.