I'm actually in the same situation, though for different reasons.
It's been such a long time since I didn't have much of an interest in the outcome of a super bowl, but this time I really don't. In the past I've had the Raven's to root against, my beloved Steelers to root for, or the Pat's to root against. And even though I like to root for defense Sherman is trying so hard to be the WWE style foil that it's hard to go with rooting for them. The natural thing is to fall into rooting for Manning, I guess. But he's is like the embodiment of every increasingly pass friendly league that I don't like, so i can't go with that either.
So I'm neutral to the outcome, I guess.