Olympus 30mm macro lens is rumored to be in development which will be released sometime in the second half of 2016.
The new prime optic with macro capabilities will deliver a full-frame equivalent of 60mm and the maximum aperture is currently unknown. If the aperture seems to be fast than this lens might compete against the Sigma 30mm f/1.4 prime model.
As we are approaching the Photokina 2016, the worlds biggest digital imaging event in September. Olympus 30mm macro lens will likely be unveiled during or around the Photokina show. The macro lens for Micro Four Thirds system should become available in the market sometime in the second half of 2016.