For the first time since Week 4, Greg Jennings is active and will start on Sunday as the Packers face the Vikings. The Packers' passing game has not been the same without him, and his presence should seriously open things up for Jordy Nelson and Randall Cobb. Donald Driver is inactive, but will be missed a bit less than he would have been if Jennings was not healthy. Jerel Worthy is also back, and starts in place of the inactive C.J. Wilson.
The biggest absence for the Vikings is Percy Harvin. Without him in the lineup, their offense should be considerably less potent than it is at their best. None of their other inactive players will be missed too much. Here's the entire list.
Green Bay Packers inactive list
Minnesota Vikings inactive list