Squilliam on 25 July 2009
Assuming that GT3 is an outlier, Gran Turismo if going by past trends will sell 10M since all the other releases cluster around that point. Halo 3 will sell over but not significantly more than 10M.
At this point you can probably say that Halo = GT without any more data. Im ignoring userbase and just focusing on an assumption that GT5 will sell around what pretty much every other GT game has sold which is about as much as Halo 3 has sold.
Tease.
