5D MK IV (or 5D C, as it may be named) should be announced by fall. Canon will have a traveling Canon Expo around that time and might use the opportunity to make a little splash.Seems interesting and probably has its uses, but lets be honest, this is not the camera most of us are looking for from Canon. At least based on things everyone has said. What we really seem to want is a 70D that shoots 4K with a 4:2:2 option, a log mode, 13+ stops dynamic range and no extreme moire/aliasing or rolling shutter. But either Canon doesn't want to deliver us that product or they can't.
