https://www.techradar.com/news/are-these-the-specs-of-the-fujifilm-gfx-100

Fujifilm has already made it known that it's preparing a GFX 100 medium format camera, and that this should arrive in the first half of 2019, but it's stayed fairly tight-lipped on exactly what that camera will offer beyond its core features. 

Japanese camera-leaking website Nokishita, however, which has accurately revealed the specs of several cameras and lenses prior to their official announcements, claims to have learned several details from "domestic sources".