So, I think it's still possible since the Cowboys won.
If the Cowboys make the playoffs in the #4 seed (winning their division) and the Packers take the #3 seed, winning their division. We take the #2 seed, winning our division, Atlanta maintains the #1 seed.
This leaves the Packers / Cowboys up against the 49ers and Bears most likely.
After the wild card round, if the Packers and Cowboys win their respective matchups, the Packers head to Seattle for a rematch. If the Cowboys win and advance to Atlanta and manage to come away with an upset, the Cowboys come to Seattle for the NFCCG.
This would be my ultimate matchup for the playoffs, culminating in a neutral-field rematch with the Patriots so we can relive our greatest victories of the season on the way to our first* Superbowl victory.