Since Denver has played New England twice in the last 5 weeks, I think I can provide a blueprint on how to beat New England.
Offense - Sack Brady, pressure him, get in his face. Do not let him get comfy back there or he will embarrass you. They throw to Gronk and Hernandez down the middle. They mostly use Welker and Branch for 3rd down, short passing plays. You need to play press and jam. Their O-Line is great at pass blocking, but only average at run blocking. They do run but they want to run with a lead to kill the clock. Ridley and Green-Eilis are nice role players. What the Ravens must do is not give up any long plays in 20 or 30 yard chunks. The Pats never show the same thing twice.
Defense - They did a great job last week, but they can be had. Their front four is solid but they do not rush the passer well. They do not have a guy that you say "we have to double-team him." Their CB and S are below average. New England cannot cover the pass for long. If you run too much you play into their hands. They will show you everything and show one thing and do another. You must control the clock and Flacco must play with poise.
Summary - You can win, but if New England plays the 1st half like last week, you are in trouble, but I have noticed they start slow most of the time, so they are beatable.