The rumored 46.1MP Canon DSLR will most likely be a 1 series body (similar to the 1D X and 1D C):
In an update to the high MP info, we're told [thanks] that a camera will eventually appear in a 1D X derived body, in the same way as the 1D C. The information said that the actual designation was not known, but it would essentially be a '1 series'.