Straight from gran-turismo.com, I will add them to the list when they are added to the official list.
BMW M4 Coupé to come to life in Gran Turismo®6
Present at Ronda and Ascari Race Resort for the launch of Gran Turismo 6 was a camouflaged version of the yet-to-be-launched BMW M4 Coupé. The stunning new car – shown publicly only as a concept until now - will go on sale in 2014. Thanks to an innovative collaboration with BMW "M" GmbH, Polyphony Digital enjoyed unprecedented early access to the car during its development phase in order to meticulously recreate the M4 Coupé for Gran Turismo 6. It will be made available through a free update shortly after the release of GT6, allowing car enthusiasts around the world to drive it before it arrives in BMW showrooms. More news on the unveiling is expected soon!
Red Bull X Series revealed
Following on from the popular collaboration with Red Bull revealed at the launch of GT5 that spawned the Adrian Newey-designed ultimate race car, the Red Bull X2010, Gran Turismo 6 will go even further by featuring three new Red Bull cars: the Red Bull X2014 Fan car (X2014/F), the Red Bull X2014 Standard car (X2014/S) and the Red Bull X2014 Junior car (X2014/J). These three cars were designed by Polyphony Digital Inc. in collaboration with Adrian Newey, Chief Technical Officer of four-time F1 champions Red Bull Racing.
Marking the excitement around the launch of Gran Turismo 6 was a very special honour. Following the presentation of the new game, Ronda’s mayor revealed that one of the city’s historic streets has been named "Paseo de Kazunori Yamauchi".
