I'm actually expecting the NFC North to be one of the tightest division next year.
The Lions should be better if they're not so injury prone, as but still have some big holes that might leave them last in the division. They traded their top a CB and gained one with the 3rd overall pick.
Bears had a great defense, I think they might be a bit worse trading their #2 CB and losing some depth guys who played extremely well in backup duty but the Bears got hot the last six weeks only losing to teams whom ended up in the Conference championship games. And I think their QB and OL should be better this coming year and the play caller MIGHT be smarter and run more. Making them overall a tougher team to beat.
Vikings defense should be worse, losing a number of veteran CBs and some DL, though they did a fairly good job trying to reload, drafting 1st round CBs in 2018 and 2020 trying to prepare for them losing the vets CBs. I'm not sure they'll be ready right away... question is how much better will the offense be to make up for that? Got a very good play caller in Kubiak, who used to coach LaFleur while he was on the Texans. But overall, I think this is a reloading year for the Vikings, but if that OL gels, and the CBs look prepared watch out, but again, I think they'll take a dip.
Packers, plain and simple, Packers got lucky in 2019, first off, they stayed healthy, their opponents didn't stay healthy and the ball and ref calls bounced their way at times. Plus they got to face a number of teams with weak OLs and QBs that struggle with pressure which played perfectly into their hands. While in 2020, they'll face a lot better offenses, but the defenses should be worse, allowing the Packers offense to carry the team once again.
I think the division will end up something like this
10-6 Packers
9-7 Bears
Vikings 8-8
Lions 6-10
Close, tough division.