Nokishita Camera has just confirmed that Sony will soon announce a new wide-angle zoom E-mount lens later this month. This lens is Sony FE 12-24mm f/2.8 GM Lens (SEL1224GM), 2mm wider than Sigma 14-24mm DG DN Art Lens for Sony E-mount.
Since Sony has two new unannounced camera codes registered: WW271448 and WW850128. Which means we may finally see Sony a7S III to be announced along with this lens later this month. Stay tuned for more info.