New Sigma Art Lens is Coming?

We are huge fans of the newish ART series from Sigma - The 18-35 f/1.8, the 35mm f/1.4 and the 50mm f/1.4 (we carry both those primes to every wedding) They also recently released the full frame compatible 24-35 f/2 and although that range isn't very useful for me - reviews report superb sharpness and quality. We now hear from CanonRumors.com that

Sigma will announce at least one more ART series lens in 2015.

http://www.canonrumors.com/2015/07/another-sigma-art-lens-coming-in-2015-cr1/#ixzz3h70iShKDWhat lens would you like to see next from Sigma?My Sigma ReviewsSigma 50mm f/1.4 ARTSigma 18-35 f/1.8Sigma 150-600