Sony has just registered a new camera code WW186333 in China. It has 2.4 GHz Wi-Fi and bluetooth. This means we will see a new Sony camera to be announced in next few months, probably in the early 2021.
Since it hasn’t 5GHz Wi-Fi, so this WW186333 may not be a high-end model like a7 IV, may be a new APS-C E-mount mirrorless camera or compact camera. Stay tuned for more info.