As others have said, neither team will take the other lightly.
As a Ravens fan (and a fan of the NFL in general), I think you guys have very good reasons to be confident.
To me, the Ravens can lose the game two separate ways.
One, the Ravens offense can be in uber-Cameron vanilla horsecaca mode and look totally inept. The standard argument against this possibility is your supposedly bad defense. While I wouldn't call your defense great, and perhaps not even good, it is way better than the useless yardage ranking and even better than its decent points-allowed ranking due to a greater-than-average amount of prevent or meaningless scores allowed in blowouts. In games where you got a bit scorched early, you adjusted (makes sense considering your coaching staff) and shut the opposition down as the game went on. In short, the Ravens can look inept regardless of the defense they are facing (on the road especially), and your defense is not bad.
Two, the Ravens defense can get exposed by your offense to such a degree that even a 'good' performance by the Ravens offense would not be enough. See San Diego. And yes, I am familiar with the 'San Diego has big WRs' excuse but it is weak, as you guys have big WRs that line up at TE. It was only one game and Webb (our best corner) was out, so maybe it was a fluke, but we have no other games (against potent offenses) to use but that one. And it was ugly, real ugly.
For the Ravens to win, neither of these things can happen (let alone both). Most likely, Ravens need to limit you to significantly less than your season average while scoring significantly more than their season average to win. Possible, sure, but still a large task.
If the Ravens can get some pressure with 4-man rushes, run the ball decently (not necessarily huge, but enough to avoid 3rd and longs), avoid turnovers, call and execute an NFL (rather than High School) offense, they have a shot.