Here is the details on the upcoming FM4 Jan car pack which will be available Jan 4th

Car gallery here:
http://jalopnik.com/5871273/forza-4-january-jalopnik-car-pack-photos/gallery/1

2011 Audi RS5
1996 Chevrolet Impala SS
1986 Dodge Shelby Omni
2000 Fiat Coupe 20V Turbo
1973 Ford Pinto
2011 Honda #33 Level 5 Motorsports Lola
2012 Honda Civic Si Coupe
2011 Lamborghini #08 West Yokohama Gallardo LP560-4
2012 Pagani Huayra
1970 Alfa Romeo Montreal

Overall a couple of nice GT and LMS cars and some 2012 models but I think there are only a couple of cars there I would really want to pay special for, so like the Nov pack I will pass on it for now... disappointed as Jalopnik is one of the car nut sites I follow and I was expecting something special, but maybe their choices were limited by T10 who knows.