For the upcoming Photokina 2018 in late September, Canon, Nikon, Panasonic, Fujifilm, Zeiss will have their new products at the show. While Sony will not announce any new cameras ahead of Photokina. The rumored Sony a7S III, a7000/a6700 will not announced before Photokina.
Sony usually has new camera codes get registered two or three months before official products announcement. While currently there is no new Sony camera codes got registered, so it is unlikely to see new product announced within 1-2 months. Maybe at this year’s PhotoPlus EXPO, we will see a7S III or a7000/a6700 announced. Stay tuned.