I was at Canon event here in Slovakia to test some glass. Canon guy told the history of Canon glass. He also mentioned that release of 1D-X is shifted to april.
One photographer also asked about 5D Mk III and this guy told us that we might see a whole new model, that will be above the current 5D Mk II in line-up (nor 7D-isch AF or higher MP count was mentioned, he mentioned that it could be something new) and we might expect it to be announced in 2012. Also he mentioned that current 5D Mk II is still big cash cow so there is no need and sense for Canon to announce it now.
There was a presentation with leneses and 200-400 f/4L with 1.4 TC was mentioned but with no release date yet.
Greetings from Slovakia !