A mention on Northlight about someone from Canon apparently visited a few studios in the New York City area recently with a “test” camera in an EOS-1D X body. Images had to be processed and viewed on a particular laptop and none of the images could be copied or kept.
The image files were very similar in size to the EOS 5D Mark III's 22mp files, but exhibited “much” better colour accuracy and detail. This camera is supposedly for later this year or early next year.
Could this be a replacement to the EOS-1D X, or an introduction of a new camera such as the rumor favourite EOS 3D?