Plus, with the way the league is being maintained--The offense will always have the advantage. Don't get me wrong, Seattle is a first class defense and probably the toughest test the Broncos will face all year long. This is by no means a "swing" in one direction.
If Seattle can bring the pressure to Peyton, they will probably win the Super Bowl. That recipe isn't anything new. Look at all the great QB's we're seen in the NFL in the past decade. No matter how good a QB is, if you can pressure him and make him hurry his throws--there will be a mistake to be made. Seattle actually has the personnel to do this.
The game will be a lot closer than what people think. Russell Wilson will move around in the pocket, because of all the pass rushers out for the Broncos. Denver needs to contain Wilson and also stop the run game. Seattle basically feeds of their run game. Same goes with Denver, although I don't think they'll be able to get their run game going. Seattle's run defense is something else.
It'll be a very interesting chess game to watch. The game couldn't come any sooner.