I received two other emails today talking about what could be coming in October from Canon.
According to one of the emails:
Canon will be launching a new camera later in October. Already in production and described internally as a “Nikon-killer”, it is reportedly a camera with lower megapixels than might be expected for a new release, but with excellent dynamic range and ISO performance.
No one has come forward in the last while to say a new 1Ds Mark IV or 5D Mark III were in the immediate pipeline, for the moment this appears to be it.