These are my predictions for the R7 (ii). Based off the recently released R6 iii and original R7.
Resolution ------------- 34.4MP Stacked.
Sensor Size ------------ Crop Sensor (22.3 x 14.8mm).
Sensor readout ------- 10ms or faster.
FPS -------------------- 15 mechanical
Sensor Stablization --- 8 Stops of 5 Axis Stablization.
ISO -------------------- 100-32,000 (100-51,200).
Video Format --------- 10/12bit H.265, CLog3.
Video Resolution ------ 6k30p OS, 6k60p LS, 4k60p OS. ~OS = OverSampled, LS = LineSkipping~
Processor -------------- DIGIC X, Faster version.
Storage ---------------- CFexpress & SD UHS-II.
This is based off my predictions and nothing more