Ymcinema spotted a new Panasonic patent that describes the design of a sort of modular and box shaped Cine Camera. The patent doesn’t say if this is a Full frame L-mount camera but if Panasonic make this camera I am pretty certain it will be L-mount.
We already have two such Box styled L-mount cameras:
The news here is that on this patent the box camera can use an attachable grip. The goal of this is being able to shoot handheld.