DOA4 {["delay"]}

This happens almost every time after DOA3 on the xbox.

The truth:
N. American version never has a solid date. They have an estimate date but never a solid one.
So what they do is put an estimate date that they sure can "delay" it. Rather than stating a date then all of a sudden, the game is "finished early" and give you an earlier date when everyone is not prepared yet.

So expect more "delays", and always for Team Ninja games, use the Japanese release date as a reference date. This applies to new games by Team Ninja, not add on like Ninja Gaiden Black. (Side note, Noth American version of Ninja Gaiden Black do have some bugs for releasing early.)

To me, DOA4 is always in the December 10 launch window.