It's coming, just not as soon as you'd like
A couple of known sources have finally popped up to talk about all the high megapixel rumors floating around this site and others. While most of what we've posted has been [CR1], there still seems to be a level of truth to it. However, I'm told that IF there is an announcement in 2012 for a high megapixel camera, it would only be a development announcement. There is nothing in the way of marketing or production for the rumoured camera.
Canon has done a very good job in recent months locking down the rumor mill, even going as far as giving far less NDA's to media types.
I am confident the prototypes are out there, we just may not get our hands on one for a long while yet.