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…...