According to latest interview with Mr. Masaaki Oshima, Senior Imaging Products & Solutions Co., Ltd. Director by DC.Watch, Sony will continue to focus and strengthen the mirrorless cameras of both full frame and APS-C in 2019. This means again we will see Sony a7000 and a7S III announced in 2019.
Sony didn’t announce the silver version of Sony a6400 (B&H Photo, Adorama, Amazon) in US, but in Japan, you can pre-order silver Sony a6400 at Amazon JP. Maybe silver Sony a6400 will be announced later in US.
Sony has just announced the new a6400 midrange APS-C mirrorless camera. The US price for this camera body is $898, now available for pre-order at. Here is a quick specs comparison for Sony a6300, Sony a6400, Sony a6500 and Canon EOS M50: