Sony is behind on updating their A-mount offering and APS-C mirrorless product line but I have not seen any reliable rumors yet. A new Sony A7s Mark III and Sony a6700 cameras are a possibility as well as some new E-mount mirrorless lenses (200-600mm, 24mm f/1.4 GM) but like I already said - so far there are no leaks, no rumors, no pictures, nothing. Sony doesn't even have a press event scheduled for Photokina this year.
Olympus may announce a new special edition camera or a lens for their Micro Four Thirds 10 years anniversary (2008-2018) or for the company's 100 year anniversary that is coming next year (October 12th, 1919). Olympus doesn't have a booth at the 2018 Photokina show, so do not expect anything big to come out in 2018. A major Olympus announcement is expected in 2019. Olympus 12mm f/1.2 PRO lens is still a possibility.
