As rumored before, Sigma will launch two new lens 135mm f/1.8 and 24mm f/1.4 in late 2013. Now recent rumors from CR said that the Sigma 24mm f/1.4 DG HSM art len is almost ready, and could be announced in late 2013 to early 2014.
This 24mm f/1.4 lens will have a design same as Sigma 35mm f/1.4 art lens. And the price could lower than $1,000 as told.
Sigma will introduce more lenses such as 24-70mm f/2 and some super telephoto lenses for the coming Photokina 2014.