If you simply say it will have the same YoY growth as it had for the first 6 months of the year, it will see 12M in Oct+Nov+Dec.
With 1M in sept, that would make 45M.
And people, stop picking on Leo-J. He has said some pretty moronic things in the past, but his predictions now are far better. Look at them, not the old ones.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS