We've talked a lot about players this off-season, but not much about what schemes they'll be in this season. Interestingly, every NFC North team has an offensive-minded head coach who runs the offense and a defensive coordinator who is CEO of the defense. All but one DC in the North has head coach experience. 

Lions

Offense

You may be thinking that Dan Campbell doesn't really run the offense; he hired a new OC to do that, Drew Petzing. Petzing spent the last few years with the Cardinals after coming up under Kevin Stefanski. I think Petzing will certainly have a lot of influence (for example by using the two tight-end sets that he prefers) and will probably even call plays, but it's Dan Campbell's offense 

Campbell hasn't been shy over the past few years about making the offense in his image even if he isn't doing the day to day or play to play managing. He's effectively fired two of his three OCs mid-season, and the other one was arguably the best OC in the NFL. 

Campbell wants a power run offense with plenty of deep shots, and that's what they'll have. 

Defense

The defense is run by Kelvin Sheppard, who will be in his second year as DC and sixth year as a coach on the team. Sheppard, like his predecessor Aaron Glenn, wants to run a man coverage scheme with some pressure. 

Last season, the Lions ran the third most man coverage in the NFL. I think this aggressive style of defense appeals to Dan Campbell, and I think they'll keep running it even if Sheppard, who may be on the hot seat, doesn't survive the year. 

Bears

Offense

The Bears and the Lions, while not perfectly similar, definitely rhyme. Ben Johnson came from Detroit and wants to run the same type of offense: power run with some deep shots. Johnson also loves trick plays and going for it on fourth down. He is one of the most aggressive coaches in the league. 

Press Taylor is the OC this season after Declan Doyler left for the Ravens' job. It is unclear how much of an impact he will have on the offense. Taylor came up under former Eagles and Jaguars head coach Doug Pederson and was the Jags OC for a few years. If I had to predict something he'd add to the offense, it would be RPOs and designed QB runs. We'll see!

Defense

The defense rhymes because Kelvin Sheppard is technically on a branch of Dennis Allen's coaching tree, the Bears' DC. Former Saints secondary coach and the Lions DC Aaron Glenn coached under Dennis Allen and was the first NFL coach to give Sheppard a coaching job. 

Allen also runs man a lot, just 3% less than the Lions did last year, but I think he has expanded more into the quarters universe than the Lions have. 

Vikings

Offense

Remember the first year the Rams had Matt Stafford and they went crazy throwing the ball all over the field? Kevin O'Connell was the Rams' OC then and he is the Vikings head coach now. The Vikings run a very similar offense and now have three legitimately good wide receivers, including one who has been the best in the league, to run it with. The problem? The QB is Kyler Murray. 

Look for some of the same long-developing pass routes but also some designed QB runs. 

Defense

The Vikings defense is probably the most fun unit schematically. DC Brian Flores comes from the Bill Belichick tree but showed in his head coach run with the Dolphins that he preferred to blitz a lot more than Belichick ever did. In that stint, Flores used a type of blitz made popular by Clemson where eight or nine men line up on the LOS and simulate pressure and then only the unblocked players actually rush, the other players drop into pass lanes.

After he was fired from the Dolphins and spent a year in Pittsburgh, Flores lit the league on fire for half a year with a man coverage heavy blitz scheme that fell back into cover-4 to trick QBs. 

After the league sort of figured out that scheme he moved into more of a cover-2 centric scheme over the last season and a half or so. Last year the Vikings ran less man coverage than 24 teams. Flores has completely changed the scheme from what he ran in Miami and even what he ran two years ago in Minnesota.

So, basically, we don't know. You can probably bet that Flores isn't going to role out the 4-3 and run the Pete Caroll Seahawks scheme but anything else could be on the table.