Strengths: Hanna has speed to stretch the field deep and break away from the pack on underneath routes. He catches the ball with his hands away from his body and he has the size to do a solid job as a run blocker. With work Hanna could develop into Jason Witten's understudy in a good Cowboys offense.
Weaknesses: Hanna is not much of a blocker, and his technique with his hands, positioning of his feet, and diagnosis of defenders needs substantial work. He was never one of the primary weapons at Oklahoma. There are times that he plays more like an oversized receiver than a good tight end. He bulked up to 252 pounds as a senior, so its questionable whether he can actually play at 4.49 speed in more than just a straight line.
2012 Outlook: Virtually none. The Cowboys have enough weapons on offense that Hanna can afford to learn on the bench or special teams. However, if there are injuries to wide receivers and Hanna impresses as a pass catcher and route runner, he could earn some time in the slot. This is unlikely.
Dynasty Outlook: Hanna is more of a factor here and worth a late-round pick in a deeper league. Jason Witten likely has another two or three years of TE1 production in him, so Hanna is more of a monitor year-by-year type of prospect that will often be found on league waiver wires.
NFL Comparison: Titans receiver Jared Cook is a probably a more fluid receiver but not quite as fast. However they are similar players in style.