Gran Turismo 5 to sell over 15 Million LTD or only over 10?

[iWarMachine]

ZorroX said:

When, you people doubt in selling power of Gran Turismo 5, just watch those trailers, or i could post more of them.
They are just stuning now and for next several years.

Another thing, if Halo 2 was able to sell around 10 mln. on much smaller userbase than PS3(will be), why GT5 won`t be able to do that? Especially, when GT5 has much more improvement(mostly online mode) over GT3/GT4. :)
And games like Halo or GT are not games like Madden, which come every year. They usually come once in 3-4 years, and have looong legs.

I don`t speak about 20 mln., but i think 15 mln. LTD could be real.
10 mln. is definitely.

PS3 probably will be around 30 mln. by the end of this year.
2010 - 40 mln.
2011 - 50 mln.
2012 - 60 mln.
That if PS3 continue to sell not more, than 10 mln. per year. Yet, there will be still 199$ price somewhere at that point.
15mln. is only 25% of 60 mln. userbase, and why not? When GT is the strongest PS franchise and overall it looks like to be a VERY great game.

=/