Update: At Photokina 2018, Sony announced they will release 12 more E-mount lenses, and AI on Sony cameras, Animal Eye AF mode.
You can watch live streaming event of Sony Photokina 2018 here.
Ahead of Photokina 2018, Sony only announced a new lens: FE 24mm f/1.4 GM Lens (B&H Photo/Amazon/ Adorama/WEX/ParkCamera). Sony a7S III or a6700/a6800/a7000 is likely to be announced in October, 2018.
Third part lenses for Sony mirrorless cameras ahead of Photokina: