I agree it's a seesaw and probably will be for a while. Fuji has quite a few projects to get out this year, hopefully the X-T2 and a few more primes.
More than likely if nothing is shown at photokina in Sept, it won't be happening for a while.
Over the past 3 years, I have followed the fujirumors site pretty closely and the owner seems well informed and most times the repeated rumors happen eventually.
Fuji's biggest hurdle to me is the optics, and if they go mirrorless, (which I assume they will), it will mean a lot of new glass. This would also mean they they jump the full frame 35mm market totally. Fuji commented over a year ago that they were not interested in full frame 35mm at the time. So maybe they feel the mirrorless 50MP chip gives them a bigger market. Hard to tell.
As I have stated many times, on this site and others, for my way of thinking, Fuji's single largest issue is the lack of good raw support for their x-trans chips. LR has issues as does C1 and from the raw files I have seen from the X-Pro2, the same issues still exist. So I would rather see Fuji step up and work with closer with Adobe and or Phase One or both and give the current technology the boost it needs.
Paul C