A big E3 announcement does not mean a delay. It could be something they have simply been keeping under wraps and will be showing off at E3 that revolves around Crackdown 2. Some examples are: xbox 360 crackdown 2 bundle announcement, brand new mode being shown off that is innovative and unique, something similar to bungie.net that would tie to the game. The possibilities are endless really.
How our favorite systems are just like humans and sometimes have issues finding their special someone...
Xbox 360 wants to Kinect & PS3 wants to Move! Why are both systems having such relationship problems? The reason is they both become so infactuated with desire while watching the Wii as it waggles on by. They simply want what they can't have.