The new Fuji X100F camera is rumored to be announced at the CP+ show in Japan (February 2017) most likely together with the X-T20 (recently two new Fuji cameras were registered in China). I expect both the Fuji X100F and Fuji X-T20 to have the new 24MP X-Trans CMOS III sensor found in the X-Pro2 ($1,549) and X-T2 ($1,799). The X100F will keep the same 23mm f/2 lens and could also get the combo shutter/ISO dial and joystick from the X-Pro2 (pictures bellow) and will probably use the same battery as the X100T:
The current Fuji X100T is currently on sale ($200 off) and has already been listed as discontinued at some stores.
Update: the Fuji X100F will also have a new dial located on the top of the front grip.