Well all we really have to go in is the data for Sigma, which the new game blows away. Sigma sold 0.28m in the us with a 37,860 launch. Whereas the 360 version launched at 173,443, which means its vastly ahead. We don't have others data so I have no idea how much it sells here. But It'll most definitely have better legs then Japan. If Sigma can sell 0.37 m on the ps3 will a significantly worse launch (and no others data) then this game should go significantly higher. 1 mill could be in reach, but it all depends on the US's legs and how front loaded it is, so I guess we wait a few weeks.
EDIT furthermore its looking like Ninja Gaiden 2 had a staggered launch in others as I know for certain that Australia hasn't got it yet, so perhaps the low first week can also be attributed to it simply not being on sale in enough areas at once.
