gran turismo 3 was bundled for a long time, and stuck around for the whole console generation, I can still go buy it in stores. So you would have to consider the whole user base as it is now, which is around 140 milion consoles. Halo 3 is up there with a mere 30 million. GT5 won't be near the same amount of success. I think prologue is a very good indicator of what it's sells will be, I would be very surprised if it sold more than a million or 2 more than prologue.







