Despite Gran Turismo 5 not being released yet, Polyphony Digital boss Kazunori Yamauchi has confirmed that the studio have already started work on Gran Turismo 6.
When speaking to AutoWeek, Yamauchi said "It's not something that we can talk that lightly on. It took 2,000 days to get all the ideas that went into GT5. It's just too early to be talking about GT6."
With Gran Turismo 5 set to be released before Christmas, we can only hope that Gran Turismo 6's development cycle isn't as lengthy.