Canon is rumored to announce a new EF 70-200mm f/2.8 lens (replacement for the current Canon EF 70-200mm f/2.8L IS II USM lens pictured above). The new version is expected to be lighter and to have a new IS system and upgraded optics. This should not be a surprise since Nikon recently announced their new Nikon 70-200mm f/2.8E FL ED VR lens.
Via Canonrumors