Greig Fraser, the Cinematographer of Dune, The Batman, The mandalorian, Rogue one, etc. Will be using the Sony FX3 to shoot Gareth Edwards next movie ‘True Love’. He mentions this on a cinematography podcast at 38 minutes and 28 seconds into it.
Also Greig’s Instagram’s latest post shows a clapper board which states that the camera being used is a sony. I’m not sure if it’ll be entirely done with the FX3, but it would be awesome.