Oh yeah it definatly, will Gran Turismo is the biggest franchise behind Mario, Final Fantasy, and Grand Theft Auto and thats because they all have more then 5 games on the market. It has a huge chance at beating halo reach ... look i have both the 360 and the PS3 and i wont be buying reach just because ODST was such a huge dissapointment to me and Reach just does not look that appealing to me, but GT5 on the other hand has been a long time coming, will be worth the wait and everyone can be like well its been delayed so long and why has it not come out yet omg im not goin to get it cuz its takin forever .......... dont kid yourself your obviously still interested if you keep checking on when it is coming out. But i think GT5 will be the best selling game on the PS3 let alone out sell halo reach, i mean hell there was a report that said that 40% of the people planning on buying GT5 didnt even own a PS3 now. So yes GT5 will Outsell Reach plain and Simple.