Stopping the pats from the defensive side of the ball would be a great challenge. Let's assume for argument's sake that you have personell capable of executing the following gameplan. In my mind, this is how I would go about stopping the patriots...borrowing signifigantly from BB's 2003 and 2004 playoff colts schemes.
1) Prevent Brady from identifying the Mike and Free Safety at the LOS. This will negate his two pre-snap reads and hinder his ability to make checks.
2) Have a zone-based scheme that emphasizes bracketing Moss. I would play three safeties over the top...one ballhawk type guy shaded to Moss' side, one guy who can matchup on Welker in the slot if needed, and another who can play the or cover the tight end. These safeties will not give any pre-snap tells to prevent pre-snap reads.
3) Jam the living hell out of the recievers and pass them off to the second level. The zones will be disguised, with the emphasis on a mix of cover-2 and cover-8. The corners will be responsible for applying a strong enough press to allow the linebackers to either play run or get after the QB. Once the recievers defeat the initial jams, they will settle into zones covering the intermediate routes. The strong safety will be sunk in anticipating the slant routes.
4) Play a 2-4 front, and never allow the line to anticipate where the rush is going to come from. Play your will at mike, your mike at sam, your inside at will...keep confusing the line and quarterback and prevent them from making pre-snap adjustments. Blitz early and often, loop, stunt, crash, drop linemen, do everything you can to stay ahead of in game adjustments.
5) Anticipate screens and draws. Be aware of the situational tendencies. Keep in mind where and when the pats will run bubble screens and pop passes. Set the offense up to run the screens and draws when you want them to through relentless pass rush. Keep backers aware of rush-offsetting plays.
6) Understand how the patriots gameplan. Deviate from your tendencies. Become enigmatic and defy your conventional logic. Anticipate how they will gameplan you through self-awareness. Gameplan for their adjustments accordingly.