Okay, so as of September 1st, Killzone 2 stands at 1,830,000.
Let's assume it continues to do about 12,500 weekly for the next 10 weeks.
=125,000
Then let's say it averages 20,000 over the 6 week holiday season.
=120,000
So by year's end, perhaps 2,075,000.
Obviously, those figures are pretty much loose guesses off the top of my head, and things could pan out very differently depending on MW2 (bad times) and Slim increasing software & release of Platinum version (good times).
The thing with Killzone 2 is that, since it is very highly polished, it won't look old hat in a year's time (if anything, it'll probably still look top of the range even by next Christmas), so potentially we might find some small legs.
Random stab in the dark, but 7,500 weekly for Q1 and Q2 and then 5,000 weekly for Q3 and Q4 could mean 195,000 and 130,000.
So maybe by the end of 2010, 2,400,000.
And 2.4mil > the 2.25mil I said I'd settle for earlier.