Nobody in the NFC North is head and shoulders better than anybody else, so the easy answer is that the winner will likely be determined by who has the least amount of crucial injuries.
GB, for some reason, decided to start drafting for the future and use their first two draft picks at positions of strengths. One guy won't play for sure, and the other guy will be sharing time with a guy who lead the NFL in touchdowns last year.
The Bears added some insurance at the QB position in Foles, which I really liked, but they didn't address the offensive line, which was a huge disappointment last year. They also lack speed at the skill positions with guys who will see the majority of the playing time.
We're in store for another year hoping the offense can score 20 ppg, and it being enough to win games.