Going along the lines of needing a "new camera section," I hope that we're talking about a medium format rangefinder camera. A full frame camera would be more of a replacement consideration for my X-T1 outfit, while a medium format camera would be more complimentary. Many of us, myself included, have already switched away from full frame systems. I think that Fuji realizes that APS-C is a much more sensible format than 35mm for a mirrorless system. Sony FE lenses are f/2.8 primes, f/4 zooms, or undeniably huge and unwieldy. Leica lenses are small and well balanced, but are manual focus only, and prohibitively expensive for what they do.
So please Fuji, if you have a full frame camera in the works, make it a DSLR -- or at least make it big and grippy.
So a dream camera! Okay, I can do this.
1st Choice:
-Medium format rangefinder, 50+ megapixels -Organic X-trans sensor -Removable back (modular is always better)
-3 lenses at launch (wide, normal, slight tele)
-And to make it really interesting, have the body take two separate mounts: A conventional bayonet system, and a clip on drop-in from the front sort of mount for REMOVABLE folding lenses (Think of an interchangeable version of a GF670 or Bessa III style lens)
2nd Choice:
-X-Pro 2, 24 megapixels, APS-C
-Organic X-trans sensor
-In body stabilization
-Sensor shift technology for large image rendering
-Vastly improved AF in low light
-2 colour focus peaking
-Larger battery capable of 500 shots/charge