I honestly don't see a team on the schedule that makes me think, "that team could beat the Patriots". Only one team has been able to really disrupt this offense and that was the NY Giants. Other than that, every team on the schedule doesn't have the personnel to duplicate what the Giants did. In fact, teams are going to have to out score the Pats to beat them. Even if Tom Brady plays like half of what he did in 2007, it wouldn't surprise me to see them go 16-0 again. With the addition of Fred Taylor, it will only make Sammy Morris, Kevin Faulk and Laurence Maroney that much more effective. And not to forget, the Pats did a great job of upgrading their depth at TE. Last but not least, the Pats replaced Gaffney with Galloway which could be a huge upgrade because of Galloway's speed and route running.
On defense, I like their secondary. Their big (Springs and Bodden are at least 6 feet tall), physical (Bodden and Springs are afraid to jam someone), and has a nice mix of ball hawking corners (Wheatley, Whilite and Butler). However, the leadership of Harrison will be missed, but the Pats got more athletic at the safety position by drafting Chung (who most people compare him to Brian Dawkins). Also, Merriweather has improved greatly and should only get better. Lastly, Sanders provides good depth at either safety position.
The main question on people's mind's is who will start at OLB and MLB? How will the Pats generate a pass rush. For starters, an improved secondary will give whoever is rushing the passer that extra second to get to the QB. For instance, there where many times last year where the rushers where just a hair off of getting to the QB. That should change now. Although I have been a Pierre Woods hater, I'm willing to see what he can for a full season if given the starting job. If that doesn't work out, the atheltic Shawn Crable will be waiting. As far as the other MLB spot, I don't think Bruschi is a lock to start opposite of Mayo. In fact, for an undrafted rookie, Guyton played a lot last season and wouldn't surprise me to see him start opening day along side of Mayo. I will be rooting for Guyton to start because he can add his speed to a historically slow LB group.