It seems that Sony has developed (and registered) a new cinema camera, defined as FX3. Although this camera has not officially announced yet, the rumors on the streets are valid. According to the picture, it’s going to be a kind of hybridization between the alpha models, and the Cinema Line cameras.
Source: https://ymcinema.com/2021/02/11/rumor-this-is-the-sony-cinema-alpha-fx3/