It appears Sigma is set to announce four new Global Vision lenses at the upcoming CP+ Camera & Photo Imaging Show 2017 (Feb 23-26). Two of those lenses – the 135mm f/1.8 DG HSM Art and 100-400mm f/5-6.3 DG OS HSM Contemporary – have already shown up on Sigma's website under the News section (the links to the actual press releases do not work).