PetaPixel believes the newly registered camera is not the Sony A7S IV, but rather an FX3 II or another FX-series cinema camera.
However, there is one potential flaw in its assessment: the FX3 is manufactured in Thailand, while the FX6 and FX9 are made in China. The applicant for the newly registered camera is Sony Japan—not Sony China or Sony Thailand—which suggests that it may not be a new FX model after all.
What’s true is that so far I have no 100% reliable confirmation form my trusted sources that indeed we are getting the A7sIV. It makes sense to me…but as we all know big companies have their own way of thinking about products 🙂
Matt Johnson is more aligned to my bet that this could be the A7sIV: