The Cardinals just need to be disciplined on defense and make sure tackles. If they start missing tackles, over run plays, lose focus in the secondary (all of which they have done at some point this season) we are screwed. Even if we don't sack McNabb we have to make him uncomfortable, we have to bump & run Jackson and we have to be wary of Westbrook on every play. Forcing turnovers again will be the key.
The Eagles will come in overconfident...they've won 3 straight road games, 2 in the playoffs. BUT they haven't played in UofP EVER, they have no idea the pent up frustration of a city ready to explode over the success of their football team...the Cardinals can't help but feed off that energy. Hopefully the combination of Cardinal energy and Eagle overconfidence will lead to a Super Bowl berth for the Cards...then we can be the worst Super Bowl team EVER.
I don't think that overconfidence will be a problem for the Eagles. I am an Eagles fan, and I'll try not to sound like a total homer, but overconfidence is more of a young team's problem. McNabb, Dawkins, et al, have been here before: four other times in the last ten years to be exact. Two of those times, the Eagles were favored by a touchdown and playing at home ... and they lost! I think these guys know enough not to overlook the Cardinals, and, as team leaders, will bring the rest of the team in line. You can already see it in Westbrook's, McNabb's, and Dawkin's comments that the Eagles players genuinely respect what the Cardinals have been able to accomplish and recognize the tough road ahead of them. They're not going to provide any bulletin board material, that is for sure.
The greater problem for the Eagles is that one Donovan Jamal McNabb almost always seems to come up flat in the "big game". I don't know why. This was a pattern established in college, and it continued as he progressed in the pros. His lifetime passer rating is 86, but in the NFCCGs he has a passer rating of about 60.
This year, he has more on the line, as this could be his last year as an Eagle. He has more to prove, he has been playing with a chip on his shoulder, and the Eagles as a team are playing with house money as they needed an improbable sequence of events to happen for them to even reach the playoffs.
I agree with your strategy for defending against McNabb and company. He is a different QB when he is pressured. The other thing that I would add is that the Cards will probably have one of the LBs "spy" Westbrook.