Sigma recently has announced the new Sigma 20mm f/1.4 DG HSM Art lens. The widest f/1.4 lens in the world. According to CanonRumors, in next year 2016, Sigma will announce at least three other prime and zoom lenses for Photokina 2016.
The Sigma 85mm f/1.4 art lens is already in testing by prototype. Expect to be released in the second half of 2016.
The Sigma 24-70mm f/2.8 OS Art lens will have a completely new optical formula for the focal range.
The Sigma 70-200mm f/2.8 OS Sport lens will be announced around Photokina 2016.
Read More: Sigma Rumors