Unnanounced cars for Forza Horizon DLC? *UPDATE* 5 Rally cars confirmed

So I boot up Forza Horizon today to download the new December IGN pack. Going into the Autoshow I found a few cars not mentioned in any of the current DLC for the game. When trying to purchase those cars though, I’m given an error saying that this is exclusive content and can not be purchased at this time.

List of cars it does this with:

 

2012 Cadillac Escalade ESV

2003 Ford SVT Focus

1992 Ford Escort RS Cosworth

1995 Ford Mustang Cobra R

1983 GMC G-1500 Vandura

1982 Lancia 037 Stradale

2012 Lexus LFA Nurburgring Edtion

2012 Lotus Exige S

2005 Mercedes-Benz SLR

2004 Mitsubishi Lancer Evolution VIII MR

2009 Pagani Zonda Cinque Roadster

2005 Subaru Impreza WRX STi

1992 Toyota Celica GT-Four RC ST185

 

There are a few rally specific cars in there, maybe these are the cars to be included with the upcoming Rally Expansion?

*UPDATE* I took some pics of the cars

*UPDATE 2 [12/14/12]* IGN has revealed this morning the cars included with the Rally Expansion which are:

1982 Lancia 037 Stradale

1992 Toyota Celica GT-Four RC ST185

1992 Ford Escort RS Cosworth

2005 Subaru Impreza WRX STi

2004 Mitsubishi Lancer Evolution VIII MR

And the 2003 Ford SVT Focus is for Season Pass Holders.

This still leaves 7 cars unaccounted for…