Fujifilm currently has a new camera code registered, this code is FF180005, the most likely camera is previous already announced Fujifilm GFX 100. The GFX 100 will be released in the first half of 2019.
Along with GFX 50R, G mount lens roadmap, at Photokina 2018, Fujifilm announced the development of GFX 100S. The concept is to create Fujifilm’s flagship model with highest performance and innovative features fully capable of meeting the diverse needs of professional and high amateur photographers. It incorporates the world’s highest* 102 million pixels image sensor which is larger than 35mm full size sensor, realizing world-leading image quality with Fujifilm’s proprietary color reproduction technology accumulated over many years and ground-breaking mobility.
According to recently rumors on FujiAddict, Fujifilm will released two new medium format mirrorless cameras in 2018 to 2019.