Atomos is in the process of developing ProRes RAW support for Sony’s new Alpha 1. The Ninja V will eventually be able to ProRes RAW from the Alpha 1 RAW output up to 4.3K 60p.
The Sony Alpha 1 uses a stacked 50.1 megapixel (approx., Effective) full-frame Exmor RSTM CMOS image sensor built with on-board memory in combination with an enhanced BIONZ XRTM imaging processing engine. It also records 8K internally.
To be clear, you will only be able to record RAW up to 4.3K 60p and not 8K. There is no indication of when this will actually be available.