According to Canon rumors: " Lots of Megapixels
Received a suggestion today that the new big megapixel camera from Canon would be the Canon EOS-1S. There wasn’t much given in the way of specs, but it’s said to cost in the area of $9000 USD. This is definitely not sounding like a Nikon D800 competitor.
There was also another mention of superior low ISO performance from the sensor. New technology will be introduced in this camera and will set the stage for sensor development over the next 2-3 years.
Everything coming in about the big megapixel camera is from new people, so pay attention to the [CR1] rating."