The speculation of these football gurus is hilarious.
My Defensive scheme prediction: The fact is if Haley is true to his word, he'll be using a 4-3 base. (Since that is what we have players for, and he said he'd build the system around the players) We'll probably experiment with a hybrid 3-4 scheme off and on, but the base will remain the same for this first season at least. We will see more blitzing and a whole lot less cover who though.