Kazunori Yamauchi, President of Polyphony Digital, mentioned at the Specialty Equipment Market Association industry trade show that he has driven most of the cars in Gran Turismo 5 and that more DLC is on the way. More exciting than that, however, was a question of the next game in the series.
“Of course we’re working on GT6 already, and I think what really will be the separating factor is something that we can’t update through a DLC is something that obviously has to be saved for GT6,” said Yamauchi. “Things that we can provide through DLC we will, so that’s really the [marked] difference.”
Source: IGN