Tony & Chelsea Northrup have talked about the camera predictions for 2019. According to this, the Sony A7000, the Nikon D760, the Canon 7D Mark III is the leading camera for 2019. 2019 predictions include some surprises like a Sony 60mm f/0.94 and Olympus f/1.4 constant zoom lenses.
Tony says he noticed a trend at Fujifilm especially on fast lenses like XF200mmF2, XF8-16mmF2.8, XF33mmF1.0. According to his predictions, Fujifilm will launch Fujinon XF 400mm f/2.8, Fujinon XF 16-55mm f/1.8, Fujinon XF 50-120mm f/1.8, Fujinon XF 70mm f/1.0, Fujinon XF 16mm f/1.0. This is another good list along with the already rumored Fujifilm X-Pro3 and Fujifilm X100F successor cameras (X200) in 2019.