Well, not quite. An announcement can mean that, but I've seen some times when the game has been in development for some time. For example, GHIV is most assuredly in development, given that at least one band has confirmed that they are in it, but there has been no official announcement yet.
I don't mean to say you are wrong, just getting my hopes up that they want to release it when they have some gameplay videos to show or something.
