PFF predicts 4-12, tied for worst in the NFC. Seems a bit harsh to me.
15. Detroit Lions (4-12)
"On offense, the Lions lost most of their highly-graded players. While some might consider 2015 a down year for Calvin Johnson, he still graded in the top-10 for wide receivers, at 89.4. The Lions also let running back Joique Bell and offensive linemen Manuel Ramirez leave. Ramirez had the highest grade among the Lions? O-linemen in 2015. The defense should improve with the return of DeAndre Levy. His run-stop percentage of 14.1 led all 4-3 outside linebackers in 2014. They will miss retired cornerback Rashean Mathis, who only allowed seven touchdowns in his three years with the Lions. Detroit is a team that is now missing their star power, and they?ll hope new stars develop in their absence."
https://www.profootballfocus.com/pro-cardinals-own-top-spot-in-first-nfc-projections-of-2016/