There are a lot of guys I expect big things from. Nearly everyone on D, McCoy, Watkins and Clay. Woods and Harvin could shine, but that wouldn't really surprise me either. I think Hogan could surprise the most with production this year. I don't think he's even top three when it comes to the WR's, but one of the three will likely get injured and he will produce when called upon. He'll benefit from teams game planning around the rest of the weapons on offense.
The coaches have been high on him this offseason as well. This was from an article Yolo linked earlier: "Lal said he's consistently outperforming his teammates in the weight room and is developing into one of the better route runners on the team."
(Fast forward three months and he's probably cut.)