Polyphony Digital have said that work has begun on Gran Turismo 6.
Project lead Kazunori Yamauchi said that anything that can't be added through downloadable content to GT5 will be used for the new game.
He told IGN: "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.
"Things that we can provide through DLC we will, so that's really the market difference."
Yamauchi also said that it was the developer's intention to continue making DLCs, with the aim of bringing out a new update every two months.
He added: "I think that will include cars and trucks that we'll be releasing maybe once every two months or so from here on out.
"What we do from here on is also really dependent on the reaction of the users to this first DLC that we just released because this is the first one. Now we have the feedback from our customers and we'll see how that will affect what we will do from here."
The first DLC for Gran Turismo 5 was released in October, alongside a title update.
Must buy games for Christmas...