We’re told that Sigma will announce the 85mm f/1.4 DG Art series lens in late August, in time for Photokina in Germany. Availability may not be until early 2015. Perhaps this is to steal some of the thunder from the expected Zeiss 85mm f/1.4 OTUS lens that will be announced at Photokina.
It’s also possible that Sigma will announce something like a 300mm-600mm supertelephoto zoom lens. Although that may not come until 2015. There was no mention of whether or not the lens would have a constant aperture, or even what the aperture would be.