New Gran Turismo circuit hinted at in DLC trailer

Gran Turismo 5 received a brand new vehicle the 2009 week. Is the arrival from the Corvettes Stingray DLC give a hint towards future GT tracks? It appears so. As spotted by GT Planet, the Willow Springs raceway seems to create a look and feel the next trailer: Is that this an indication at further DLC? Possibly new tracks [...]