This is in order. Denver and Pittsburgh both give off a similar feel, though the Broncos are much better off on the defensive side of the ball. This year has Peyton Manning's farewell tour written all over it, but the vulnerability displayed by the offense following his injury, and the subsequent chess moves made by the organization, have us feeling a little down on Denver heading into the season opener. We know Manning can learn Gary Kubiak's new offense in a year, but can everyone else? This could change, of course, and we have no reason to doubt the fact that Manning will play at an All-Pro level once again. But how does everything else work around him? How does Denver's defense work without John Fox and Jack Del Rio? How does a depleted supporting cast play into the offense's dynamics?