Dans Canon rumors ils écrivent :

"1Ds Mark IV before 5D Mark III?
We’re told August will be a major announcement month. The 1Ds Mark III replacement and 3 lenses will be announced. No detail into what lenses.

5D Mark III to follow soon after according to a few folks.

It probably won’t be until July when we started getting solid stuff with specs and a clearer picture of what’s coming down the immediate pipeline."