Not Tom Brady.
Okay, in all seriousness, it's something of a toss up in my mind.
It could be Denver very easily, if their defense can do its job. Still, Cam Newton is a lot harder to get to than Tom Brady, so that won't be easy (you know, because Cam has skills Brady doesn't...ok I digress...).
Probably Carolina, although I'm not making any official prediction because I do think it's a toss up.