According to SARumors, Zeiss will announce a new ultra-wide prime lens for Sony alpha mirrorless cameras in Mid-March, 2016. This lens will be Zeiss Batis 18mm f/2.8 lens.
The price and specs of this lens is currently unknown. Rumors also said there will be more Batis lens in 2016. Stay tuned for more info.
Read More: Sony Camera Rumors