Well Detroit still wants to win. Even if they were to lose the last game of the year to GB for the division title, they still would like another win so they get a wildcard spot at the very least. Lions are gonna throw all they have at this game I just don't think its enough.
Put yourself in the Lions shoes. Which would you choose?
A. Go all out with a short week ahead before the GB game so you can try and secure a wild card spot. While GB goes out and plays hard because they have to win. Then slug it out, on short week remember, with GB for division title. Lose that and your gassed and travelling for wild card game.
B. Go through the motions vs DAL. Get healthy, get right, and go home for week 17 and kick a travelling GB team in the mouth, who's playing 3rd division game in a row, and win the division. Host playoff game instead of travelling.
I choose B.