The leaked image of the new Zeiss 40mm f/2.0 FE Batis
These are the lenses that are likely to be announced in 2018 and 2019:
(SR4) Sony 24mm f/1.4 GM FE
Probably coming at Photokina. The lens launch got delayed from Spring to Photokina because of noise issues. The new developed version will be slightly larger.
(SR5) Zeiss Batis 40mm f/2.0 CF FE lens
Announcement likely between Photokina and PhotoPlus. Specs:
Distagon optical design
The shortest shooting distance is 0.24 m
With focus limiter (Full / ∞ ~ 0.4 m / 0.5 m to 0.24 m)
Filter diameter is 67 mm
Batis Size close to 85mm (40mm is slightly smaller)
(SR4) Sigma 70-200mm f/2.8 FE lens:
This lens could be announced at Photokina.
(SR3) 200-600mm G FE:
I heard the 200-600mm FE is on the Sony roadmap and that it should be announced some time after the 400mm FE availability.
(SR3) 500mm and 600mm f/4.0 GM FE:
Both lenses are being developed by Sony and one of these could be announced in late 2019 at earliest.
(SR4) 135mm FE GM:
The lens is scheduled to be released in 2019. I am not 100% sure about the aperture but it should be f/1.8.
One more Samyang AF lens will be announced this year
New super wide FE lens and and new FE zoom to be announced between Photokina and early 2019
(SR4) Sigma 50mm f/1.4 APS-C E-mount lens:
Sigma should announce this new APS-C lens at Photokina