According to latest rumors the Sigma 24-70mm f/2.8 OS Art lens is expected to be announced sometime in February 2017. If such Lens announced by Sigma then for sure it will low down the sales graph of native 24-70mm F2.8 Cannikon lenses. As the information we have received a while ago that Canon is testing 24-70mm F2.8 IS Lenses. Still, the expected date of arrival is unknown. Whereas Nikon already have 24-70 F2.8 VR lens in it’s arsenal.
Also see – Canon .CR2 File Format Hacked and Decoded