Will Modern Warfare 2 affect Assassin Creed 2 and Left 4 Dead sales?

[Munkeh111]

I think you have the releases slightly wrong

In the UK it is Modern Warfare 2 on 10th, Assassin's Creed 2 20th and LFD 2 on 30th

I am sure they won't really interfere, maybe MW 2 on LFD 2 a little, but AC is certainly a strong enough brand