Today's question: With Adrian Peterson back, what kind of a challenge does the Minnesota Vikings' offense pose for the defenses in the rest of the division?

Rob Demovsky, Green Bay Packers: A running back can take you only so far. The last time Peterson led the NFL in rushing (2012), all the Vikings could muster was a wild-card playoff berth. You still need a quarterback. Maybe Teddy Bridgewater will become good enough to make the Vikings a dual-threat offense, but we haven't seen enough to know that yet. That said, the NFC North isn't a murderers' row of run defenses. The Packers ranked 23rd against the run last season, and the Bears finished 17th. Sure, the Lions had the best run-stopping unit in the league in 2014, but they lost their best defensive player, Ndamukong Suh, in free agency, so it would be unrealistic to expect them to hold teams under 70 yards rushing per game again this season. As for the Vikings, is it a stretch to think they could have the best defense in the division by the middle of this season, if not sooner?

Jeff Dickerson, Chicago Bears: Peterson is a game-changer. Even at 30 years old -- the age after most NFL running backs decline -- Peterson is likely to return with a vengeance after playing in just one game last season. I don't expect Peterson to rush for 2,000 yards, like he did in 2012, but 1,200 rushing yards and 10 touchdowns sounds realistic. I felt Bridgewater improved throughout his rookie season, and that was without the benefit of having Peterson in the backfield. A healthy Peterson should take pressure off Bridgewater and open up the vertical passing game for speedy wide receivers Mike Wallace and Cordarrelle Patterson. NFC North defenses won't fear Minnesota's offense, but Peterson forces opponents to take the group seriously because of his incredible ability to take it to the house on any given play.

Michael Rothstein, Detroit Lions: It might possibly be a really difficult challenge, depending on the type of shape Peterson returns in. If he looks anything like his 2013 form, he'll be the best running back in the league and should open up time, space and defenses for Bridgewater. If Bridgewater takes the expected second-year jump, that could make Minnesota's offense multidimensional and much more effective than in 2014.