The Belgian store PCH Pro Shop posted several pictures of the upcoming Fujifilm GF 100-200mm f/5.6 R LM OIS WR medium format lens (the images now removed):
Shipping is expected to start in February 2019 according to FujiAddict. The new Fujifilm GF 100-200mm f/5.6 R LM OIS WR lens can be used with the existing GF 1.4x TC WR teleconverter to cover the zoom range from 140mm to 280mm (equivalent to 111-221mm in 35mm format).
Via FujiAddict