I expect this to be a low-scoring game and won by the better running team. Both defenses appear to be too strong to give up too many big plays downfield. I've stated this before, last year the Legion of Boom shut down Jimmy Graham twice in the same season. Gronkowski is a little different because of his physicality, but I expect Seattle's secondary (mainly Cam Chancellor) to be able to keep him in check throughout this game.
If it comes down to running backs, Marshawn Lynch can break a game wide open with his ability to break off a long run. New England will probably load up the box and lean heavily on Revis and Browner to play man-to-man and not allow Russell Wilson to beat them through the air. If the game is close the 4th Qtr, my money is on Lynch and Wilson to make the clutch plays.
Call it a hunch, but I trust Seattle to be the more dominant team on Sunday. The Patriots can move the ball well, but can they punch it in when they have red zone opportunities against Seattle's D? Or will they have to settle for FGs like Green Bay had to do, which will end up costing you. Both the Packers and Panthers couldn't sustain enough momentum in the second half. The crowd noise could be a big factor as well. We saw last year how the crowd noise for Seattle was able to affect Denver early on. It could be as loud, if not louder this year in Arizona.