Sigma recently announced that they are going to announce a new lens at upcoming PhotoPlus EXPO 2017. According to previous rumors, this new lens will probably be Sigma 70-200mm f/2.8 DG OS HSM Sports lens, available for Canon EF mount and Nikon F-mount.
Sigma press release:
Sigma Corporation of America, a leading still photo and cinema lens, camera, flash and accessory manufacturer, will showcase its full line up of Sigma Global Vision lenses, including a brand-new addition to the line, at the upcoming PDN PhotoPlus Expo 2017 Expo held at the Jacob Javits Convention Center in New York City from October 26-28, 2017 (booth 837).