Sony is rumored to announce a new FE 20-70mm f/4 G lens (SEL2070G) lens in the next few weeks. According to recent rumors, Sony will soon announce a new camera too. The new camera code is WW694956.
Currently, no info about the new WW694956 camera, could be the rumored Sony a7C Mark II.
The original Sony 24-70mm f/4 is quite compact and lightweight, but it was never the best performer. Stay tuned for more info.