Over at 43rumors you can see some of the first images of the GH5s. So far we can say this camera looks like the GH5 with two small changes:

1) It has the same G9 drive wheel with the red ring 2) It has a big red recording button

Teh red button probably marks that this is a purely video oriented camera. Expect a special new 4K sensor on this (maybe 10 Megapixel?). So far little we know about this camera: