Full frame GH5/6? , i dont see that happening. Why? The four thirds mount is too small for full frame sensor, meaning they will need to make a new mount, rendering all other m43/mft mount glass useless. Canon M mount and Sony E mount started with APS-C , but with FF possibilities. Sony took advantage of this, and canon...well we know how "serious" they are about Mirrorless,but its possible for canon to come up with a Full frame Eos M camera. and keep the same mount.If you create a new mount, you need to provide glass, and creating a lens lineup takes time. Panasonic needs to keep developing m43, its has still a lot of gaps to fill. Keeping 2 systems alive is hard. Sony hasn't released a new E mount (=aps-c) lens in years, they want to build upon FE first. (poor A mount)On the other hand, Panasonic needs a bigger sensor, why? 8K. Panasonic says they see a 8K future.To provide that they need a 32MP sensor. Even if it is theoretical possible to cram 32 megapixel on a 43 sensor, there is no resolution befit, because of diffraction. (if you shoot f2.8 and up) The only way out is using super fast glass(while keeping 32MP of sharpness) or increase sensor area. II suspect to see a aps-c GH5/6 camera some day. APS-C does fit, and they can keep their m43 lineup. Its the most sensible option. JVC already has a APS-C m43 video camera.