The Japanese website Nokishita reports that the new Sigma 16mm f/1.4 DC DN Contemporary lens that was announced two weeks ago will be available for pre-order start shipping on November 22nd. The Japanese price is expected to be ¥48,600 including tax (around $420). I expect the US price to be $399. Check the product listings at B&H.
The Sigma 16mm f/1.4 DC DN Contemporary is a mirrorless lens for Sony E-mount and MFT based cameras.
In addition to the new 16mm f/1.4 and the already existing 30mm f/1.4 DC DN Contemporary, Sigma is also planning to release another middle telephoto lens for Sony E-mount and MFT (between 45mm and 90mm focal length, maybe even between 60mm and 90mm):