I would like to be wrong, but I do not believe...The Steelers will have to beat the Patriots and/or Broncos this year and last year against the Patriots, the Steelers have allowed 55 points and 600 yards against the pats and this year, the defense is worse than in 2013
In 2005, the Steelers were a favorite against the Bengals, light underdog against the broncos and favorite against Seattle...Only the win against the Colts were a big upset
But it is true that the 2007 Giants were highly unlikely....Probably the most unlikely champion of all sports since a very long time