No Canon 5D mark III coming on Nov 3 according to canonrumors, what other website and blogger say about Nov 3 announcement? See here, We have published few days ago Canon 4K S35 Video Camera Coming on November, now canon rumors also confirms that two new video cameras are coming with PL and EF mount.
Canon 4K S35 Video Camera Specification
Super 35mm sized sensor
There will be two options Canon EF and PL Mount.
EF mount will be affordable camera with 5K price range