Like it or not, the Fujifilm X-H1 has no real reason to exist. If the X-H2 is to happen, it needs one to justify its status as the "flagship" of the X-series range Fujifilm claims it to be. When it first came out, it was $2000 for basically just a $1500 X-T2 with a bigger grip and IBIS. Sorry, but that's not gonna cut it if they plan to release an X-H2 with X-T3 guts at the end of that product's lifecycle, especially if they plan to price it above $1500 again. It needs a real reason to exist and I have an idea.
Fujifilm proudly declared they would not be going with a 35mm sensor size in the future, for one, believing that it's a bit redundant since they currently cover APS-C and cropped medium format. There are significant benefits to both formats: the former covers a Super35 area and is currently fast enough for excellent video capabilities that consumer level 35mm cameras are currently unable to match, while medium format has a level of detail and low light capability that exceeds all current 35mm format sensors.