CameraSize added the GH5 to their image database. You cna now compare the size of the GH5 with any other camera. These images show it versus the GH4.

Preorders (use these links to support my work thanks!):
GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at ParkCamera.
GF9 (Black) at Amazon, BHphoto and Adorama.
GF9 (Silver) at Amazon, BHphoto and Adorama.
Battery Grip for DC-GH5 at Amazon, BHphoto and Adorama.
Leica 12-60mm at Amazon, BHphoto and Adorama.
12-35mm F/2.8 II Asph at Amazon, BHphoto and Adorama.
35-100mm f/2.8 II ASPH at Amazon, BHphoto and Adorama.
45-200mm f/4-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
100-300mm f/4.0-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
Panasonic DMW-XLR1 XLR Microphone Adapter at Amazon, BHphoto and Adorama.
DMW-DCC15A DC Coupler at BHphoto and Adorama.
FZ80 camera at Amazon, BHphoto and Adorama.

3Dkraft (Click here) posted the First in-depth review of the new Laowa 7.5mm f/2.0 MFT lens:

This is one more lens demonstrating the skills of the designers and engineers at Venus Optics putting so extreme features in such a little housing. The lens seems to be build very solid and the focus and aperture ring operate very smooth. The optical performance is not perfect at open aperture as you can see some coma, some CA and vignetting and a bit decreasing resolution in the edges but for that size and weight I am really surprised how well it performed. Stopped down to f/5.6 or f/8 the lens is also a good choice for architecture and landscape. For drone applications I whish they could make it even lighter – e.g. with a special edition in a plastic housing – as for example the gimbals of DJI’s micro Four Thirds cameras currently can balance and stabilize only lenses up to 158g.

The lens is yet not available for preorder. But It will start shiopping soemtimes in early 2017.

GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at ParkCamera.

What’s the frist reaction from well kown Youtubers who actually didn’t test the GH5 yet? Watch those videos:
GH5 Detailed Analysis & Top Questions Answered! (Max Yuryev on Youtube)
Panasonic GH5 Preview: 4K/60P & 6K/24P! (Tony Northrup on Youtube)
Panasonic GH5: The ONE big thing (Hugh Brownstone on Youtube)
Panasonic GH5 Preview & First Impressions (Dan Watson on Youtube)
Full GH5 Specs Announced | 31 Things You Need to Know (Stronz Vanderploeg on Youtube)
Thoughts from a Sony Mirrorless Shooter (ThatCameraGuy on Youtube)

Preorders (use these links to support my work thanks!):
GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Cyberport.de and ParkCamera.
GF9 (Black) at Amazon, BHphoto and Adorama.
GF9 (Silver) at Amazon, BHphoto and Adorama.
Battery Grip for DC-GH5 at Amazon, BHphoto and Adorama.
Leica 12-60mm at Amazon, BHphoto and Adorama.
12-35mm F/2.8 II Asph at Amazon, BHphoto and Adorama.
35-100mm f/2.8 II ASPH at Amazon, BHphoto and Adorama.
45-200mm f/4-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
100-300mm f/4.0-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
Panasonic DMW-XLR1 XLR Microphone Adapter at Amazon, BHphoto and Adorama.
DMW-DCC15A DC Coupler at BHphoto and Adorama.
FZ80 camera at Amazon, BHphoto and Adorama.

GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Cyberport.de and ParkCamera.

The video above gives you an insight on the GH5 ISO performance (By Neumannsfilm). And Charbax posted that Interview with Matt Frazer from Panasonic:

Preorders (use these links to support my work thanks!):
GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Cyberport.de and ParkCamera.
GF9 (Black) at Amazon, BHphoto and Adorama.
GF9 (Silver) at Amazon, BHphoto and Adorama.
Battery Grip for DC-GH5 at Amazon, BHphoto and Adorama.
Leica 12-60mm at Amazon, BHphoto and Adorama.
12-35mm F/2.8 II Asph at Amazon, BHphoto and Adorama.
35-100mm f/2.8 II ASPH at Amazon, BHphoto and Adorama.
45-200mm f/4-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
100-300mm f/4.0-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
Panasonic DMW-XLR1 XLR Microphone Adapter at Amazon, BHphoto and Adorama.
DMW-DCC15A DC Coupler at BHphoto and Adorama.
FZ80 camera at Amazon, BHphoto and Adorama.

Panasonic Lumix GH5 – Can it See in the Dark? from Dan Chung on Vimeo.

GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Cyberport.de and ParkCamera.

Newsshooter posted that GH5 video fromNick Driftwood:

Nick then runs through the ISO range from 200 to 12800. He claims to see a definite improvement in performance over the GH4. 3200 ISO in particular looks really useful with not too much noise at all – nothing that NEAT video can’t fix.

And Nofilmschool posted an interview with Luke Neumann:

It now has enough features to be considered the best all around camera for its price. In my opinion, at least. I would only consider something like the A7s if you really had a specialized shoot or look in mind.

This is one of the videos from Luke Neumann. You can download them all at Mediafire.com.

Preorders (use these links to support my work thanks!):
GH5 at Amazon, BHphoto, Adorama and Panasonic US. In EU at Cyberport.de and ParkCamera.
GF9 (Black) at Amazon, BHphoto and Adorama.
GF9 (Silver) at Amazon, BHphoto and Adorama.
Battery Grip for DC-GH5 at Amazon, BHphoto and Adorama.
Leica 12-60mm at Amazon, BHphoto and Adorama.
12-35mm F/2.8 II Asph at Amazon, BHphoto and Adorama.
35-100mm f/2.8 II ASPH at Amazon, BHphoto and Adorama.
45-200mm f/4-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
100-300mm f/4.0-5.6 II POWER OIS at Amazon, BHphoto and Adorama.
Panasonic DMW-XLR1 XLR Microphone Adapter at Amazon, BHphoto and Adorama.
DMW-DCC15A DC Coupler at BHphoto and Adorama.
FZ80 camera at Amazon, BHphoto and Adorama.

ePhotozine posted the full final E-M1II review:

Without doubt the Olympus OM-D E-M1 Mark II offers an impressive array of features*, including excellent image quality, a unique 50mp shooting mode, Cine 4K video, excellent 5-axis image stabilisation, up to 60fps continuous shooting, dual SD card slots, weather-sealing, access to a wide variety of Micro Four Thirds lenses, a high resolution electronic viewfinder (EVF), a tilting touch-screen, improved battery life, and more. However, it’s up to you whether you have the budget to spend this much on a camera. If you do, then we think it’s well worth the money.

And Photorec posted that Olympus E-MII Video test

Olympus E-M1II store links:
In USA at BHphoto, Amazon, GetOlympus and Adorama.
In Europe at ParkCameras. WexUK. Digitech.ch.