Brett Favre tends to rise up in big games, or at least what he perceives to be big moments. Facing the Packers represents a big game for him, as much because the Vikings are teetering on the playoff edge as with the fact that it could be the final time he sees them on the other side of the field. Expect some big moments from Favre, who also should have more help at receiver.
It would be dangerous to play Sidney Rice in his first game this season, especially because he'll be a part-timer. Bernard Berrian, if he plays, might not get a full workload, either. But having both players out there will help out Percy Harvin, who was a thorn in the Packers' side in the first matchup. Harvin is a plus start for fantasy purposes.