According to latest rumors, next Sony FE lens will be Sony FE 24mm f/1.4 GM lens, to be announced around Photokina 2018 in September.
According to recently rumors, Sony may announce a new FE 24mm f/1.4 GM lens next. Currently, Sony GM lens lineup are all standard, medium telephoto, telephoto prime lenses, while lack of wide-angle GM prime lenses. So next lens from Sony will probably be a FE 24mm f/1.4 GM lens. Stay tuned for more info.