First WILD rumors about the Sony A7sIV specs: 2 layer sensor and crazy ISO performance?

The A7sIII is nearly four years old. So it’s now due of a replacement. But I did not get any info yet from trusted sources about when to expect the new A7sIV. Sometimes I even wonder if tere will be ever a new A7sIV because of cameras like the FX3 and A9III that can do perfectly fine video too.

All I am getting now are wild rumors from unknown sources. Here I am going to share one of them just for the sake of discussion. Would a A7sIV with 2 layer sensor make sense to you? Here are the rumored specs:

My info about A7siv – Actual: 20.5 Megapixel
Effective: 19 Megapixel same/similar as FX9, but with 2 layer transistor and large photodiode for 2x low light.

Stacked sensor.
No global shutter but very low rolling shutter.
No AA filter.
6k120p 6k60 6k30 6k24.
4k120/60/30/24 Oversampled from 6k crisp image.
8 stops ibis standard plus dynamic active stab.
Dual iso with second iso at 25600 !
Slightly Improved evf, screen.
Better ergonomics.
No overheating new radiator to withstand increased resolution and oversampling.

All the best.
Price increase from 3499$ to 4000$ only.