According to Mark Kaboly of the Pittsburgh Tribune-Review here are the supposed opponents for the 2013 NFL season.
If this schedule is true, the Steelers will have a lot of road tests. The Bengals have proven they are a threat these past two seasons and the Ravens games are always the toughest of the season. Oakland has been a tough place for the Steelers to win and New England and Green Bay are both tough football teams with franchise quarterbacks. The Vikings also have improved tremendousl and have a chance to make the playoffs.
Home wise, there should not be as much trouble. All of these teams except the Bears and Dolphins have underachieved and the Steelers could once again do well at home.
These schedule has not been confirmed by the Steelers but would at least on paper be a lot more challenging than this season’s was.