I think it'll be really close, the Gran turismo 5 prologue is doing much better then GT4P, and Gran Turismo 4 sold 9.5 million. Gran Turismo is a really good racing game.

Edit edit edit everythings Edited: It should have a good release by the time GT5 comes out (I've heard different things, either late 2009 or early 2010) it's safe to say the PS3's userbase will be about 30 million (really god knows, everyone didn't expect the X360 to sell as much as it did for the holidays, so could be more or less but 30 million is a safe guess). So it should have a really healthy first week, maybe 2 million first week and Gran Turismo games are know to have great legs so it should be close like I said.

Edit: Just incase anyone forgot, here's the numbers for the previous Gran Turismo games.

Edit: Not sure if this will help but here's a list of how many PS2's were sold in Japan, America and Total Others at the time each Gran Turismo was released. (GT1 and 2 are not on the list because the information was n/a)

Yes, but it could take a few years

...yes but it will take a while.

Yeh it definitely wont happen over night but it'll have great legs

Yes it will but not with 400$ PS3.

Easily, Halo 3 has shown that big games sell no matter what the install base and of course first full GT game for PS3, it' going to do very well. Before anyone mentions PS3 install base........market saturation, that is all. :P

as long as there is no price cuts .. it won't sell well .. FORVER

Especially here in the EU, a £100 price drop + GT5 = many many sales for both GT5 and PS3's. GT5 prologue managed 1 million pre orders here in the EU, GT5 should pass prologue numbers within a month.

You can't grab both prologue sales and project GT5 sales. It's not that simple.
But yea, I believe the game is capable of that. Just 5~6 are in europe.
We europeans are crazy about GT.

It will, based on previous entries into the series....and the ps3 userbase being quite large by the time it comes out