GoW III will be able to handle 50 ENEMIES ON SCREEN AT ONCE

[Munkeh111]

Remember the end of Heavenly Sword, where you have an objective to kill about 1,000 enemies, most of them on screen at the same time though from afar, but the key to it is how they do a similar thing in GeoW 2, I believe they don't have individual AI, but group AI to make their memory use a lot lower