2013 Ford F-Series Super Duty Teased Prior to Next Friday's Debut

There's a new F-Series Super Duper Duty coming out next Friday, March 9, and to get us into the mood, Ford issued this teaser image of its pickup truck covered in a black sheet.
But that's about all Ford is willing to share with us so we don't know if there are actually of lot changes hiding behind the sheet or if the Blue Oval has simply touched up the truck here and there to keep it competitive.
A larger version of the opening picture can be found right after the break.