It wouldn't shock me IF … NFL Week 5: Nick Sirianni's seat heats up, Sean Payton takes back playcalling

Could the 49ers plant their flag as the Super Bowl favorites? Will Jacoby Brissett be the latest QB to light up the Lions? When you step outside in the morning, you'll notice that chill in the air. It's a reminder that the fall months have arrived, and that typically means the action across the NFL is ramping up. Now that the first month is in the rearview mirror, teams are rounding into form, and we should start to see some significant separation between the contenders and pretenders over these next few weeks. This is also the time when we begin to see if some early-season struggles or even hot starts are legit or mere flashes in the pan.

For the former, that could create some awkward situations, particularly as we continue to gauge the temperature of the head coach's hot seat or coordinator duties. Both of those could be at the forefront of the headlines by the time we wrap up Week 5 in the NFL, which we discuss in depth below, along with other storylines that could sprout out of the upcoming slate. The Philadelphia Eagles might be on the verge of blowing it up. The club is off to a teetering 2-2 start to the regular season, has been dealt with an onslaught of injuries, and saw Lane