While this comes as no surprise to me, Infinity Ward has decided not to include Commando in the upcoming Modern Warfare 3, apparently realising that stabbing some one who is 3 metres away isn't exactly possible. I am completely on board with this--I can't count how many times some noob with Commando, Marathon and a Tac Knife has ran at me across a field and killed me before I could even get off a shot. However, I do suggest that the short knifing lunge be included, since knifing without one is near impossible unless your target is completely stationary, as Black Ops has shown us.
I think Commando should be replaced with Overkill! Who's with me?!
Source: Game Informer