GT6 was announced at a 15 year celebration of Gran Turismo at Silverstone today. The game is due for release around Christmas. There has been released a small trailer, and some screen shots as a part of this. We rally fans will be happy to see that the Audi Sport Quattro S1 at last has been included in the game!

Link: Gran Turismo®6 is coming! - News - gran-turismo.com