Baltimore. New kids on the block with a superbowl, a dominant criminal LB, a criminal RB, the former owners of Priest Holmes, a couple of serious upsets of the Broncos (including playoff drubbing), took Sharpe away for awhile, etc, etc....
They are like the new kid at school that came in, showed you no respect, got you in trouble with the principal, and stole your girlfriend. All without remorse.
I feel a rivalry brewing here if they can play each other fairly consistently.