Updated expected specs in first topic with all latest rumors.

A compact, lightweight system with excellent portability

The OM-D E-M1 Mark II will feature weatherproof construction in a compact and lightweight design. Coupled with an Olympus M.ZUIKO lens, the OM-D system remains extremely compact, providing the ultimate in portability for shooting and transportation. Hand-held super-telephoto shooting will be possible with the M.ZUIKO Digital ED 300mm f4.0 IS PRO lens (600mm focal length in 35mm equivalent), and this camera and lens combination will even be compact enough to store in carry-on luggage when flying.

Weatherproof construction and Super-Sonic Wave Filter dust reduction system

The OM-D E-M1 Mark II will feature high-performance weathersealing for excellent dustproof, splashproof and freezeproof (down to 14°F / -10°C) performance so that users can shoot in the harshest of conditions. This weatherproofing will not be limited to the camera body alone: it is extended across the entire OM-D system, including the dustproof, splashproof, and freezeproof M.ZUIKO PRO lens lineup5. In addition, a Supersonic Wave Filter (SSWF) dust reduction system will vibrate the image sensor more than 30,000 times a second to virtually eliminate any dust that may land on the sensor while changing lenses.

High-performance shutter rated for 200,000 actuations

A newly-developed shutter will be rated for 200,000 shots3 to withstand consistent daily use in professional environments.

Dual memory card slots

The OM-D E-M1 Mark II will feature dual memory card slots to allow simultaneous use of two SD cards for more versatile shooting. The slots will be positioned in a staggered layout, making cards easier to insert and remove. Users will be able to select from four types of settings: “Standard” will record to the specified card; “Automatic Switching” will automatically switch to the second card when the first card becomes full; “Dual Independent” will record to both cards according to the specified image quality setting assigned to each; and “Dual Same” will record identical files to both cards simultaneously. Slot 1 will support UHS-II and UHS-I cards, while Slot 2 will support UHS-I cards.

High-capacity battery and rapid charger

With an improved 1720mAh rating, the new BLH-1 lithium-ion rechargeable battery will have a capacity that’s approximately 37% higher than that of the BLN-1 used in the predecessor model. The Olympus OM-D E-M1 Mark II will display the remaining battery life percentage on the rear monitor so that users will never be surprised by a depleted battery. Also, the new BCH-1 charger will be 50% faster than the previous version. 3.Exceptional Image Quality

Higher resolution and improved dynamic range

The new 20.4 megapixel Live MOS sensor will offer 25% higher resolution than the predecessor model, and the absence of a low-pass filter further enhances image quality. A higher dynamic range6 will improve the reproduction of highlight and shadow detail, and an anti-reflective coating on both sides of the sealing glass over the sensor will further enhance contrast performance.

Improved image quality at high ISO settings

The newly-developed TruePic VIII Image Processor will dramatically improve image quality when shooting at high ISO settings, making it possible to capture images with minimal noise. The normal sensitivity ISO (ISO AUTO) range will be expanded to ISO 6400 for greater flexibility in a variety of shooting scenarios and Fine Detail Processing II will ensure that no detail will be lost due to over-sharpening.

ISO 64 equivalent ISO LOW setting

The ISO LOW setting will be equivalent to ISO 64, providing greater flexibility to shoot at wider apertures even in brightly-lit situations, making it possible to achieve beautiful shallow depths-of-field.

50 Megapixel High Res Shot Mode

A High Res Shot Mode will utilize the Voice Coil Motor (VCM) system of the 5-Axis Image Stabilization System to precisely shift the sensor in half pixel increments while capturing a total of eight shots. The camera will then automatically composite the shots into a single 50-megapixel equivalent ultra-high resolution image7. This unique Olympus technology is a necessity for any still life photographer or anyone that requires ultra-fine detail reproduction. The new TruePic VIII Image Processor will effectively suppress blur due to subject movement, making it possible to utilize High Res Shot Mode in a wide variety of shooting conditions, such as gently-blowing grass, tree leaves, or ocean waves. In addition to 80 megapixel RAW and 50-megapixel equivalent JPEG images, it will be possible to select a smaller 25 megapixel equivalent file size.

In-body 5-Axis Image Stabilization

The Olympus OM-D E-M1 Mark II will be equipped with the latest in-body 5-Axis Image Stabilization that compensates for all types of camera shake. An optimized correction algorithm will boast outstanding compensation performance with approximately 5.5 shutter speed steps of compensation*1. Also, when combined with Olympus lenses equipped with in-lens image stabilization, 5-Axis Sync IS will provide the world’s most powerful 6.5 shutter speed steps of compensation for blur-free handheld shooting of stills and video.

Silent Mode

Silent Mode will utilize a silent electronic shutter to eliminate all mechanical noises while shooting. Silent Mode will be especially useful for shooting in situations where noise of any kind is not appropriate, including stage performances, concerts, and even sleeping children. Also, it will be possible to deactivate the AF Illuminator, autofocus confirmation beep, and flash for practically silent operation.

Focus Stacking / Focus Bracketing Modes

Depth-of-field is especially shallow when taking macro photos, making it difficult to capture an image that is completely in focus from the foreground to background, even at smaller apertures. Focus Stacking Mode will capture eight shots at different focal positions and composite them to form a single shot that is entirely in focus. The depth-of-field provided by Focus Stacking will be far deeper than even the smallest aperture at close distances. Focus Stacking Mode will be compatible with seven Olympus M.ZUIKO lenses for a variety of shooting scenes.

Focus Bracketing Mode will capture up to 999 shots at different focal distances with a single shutter button press, allowing users to choose shots with the optimal focus point or use commercially-available software to composite all images into one picture with stunning depth-of-field.

Live Composite / Live Bulb Modes

Live Composite Mode will be available for shooting fireworks and cityscapes against starry backgrounds. While using Live Composite, the exposure of dark areas remains constant, while areas of light that change during the exposure are updated, creating trails of light from stars or fireworks. Live Bulb and Live Composite Modes will allow users to easily check the image on the LCD monitor in real time, instead of relying on intuition.

Keystone Compensation

The camera will be equipped with Keystone Compensation for photographing architecture. Keystone Compensation digitally provides tilt and shift functions with all M.ZUIKO lenses, and because trapezoidal compensation may be applied simultaneously to both vertical and horizontal directions, it is possible to shoot various subjects in a wide range of situations.

Tethered shooting with Olympus Capture

Olympus Capture is now available in Version 1.2 and will support tethered shooting with the Olympus OM-D E-M1 Mark II. High-speed data processing and transfer via the USB 3.0 Type C port will be four times faster than with Olympus Capture Version 1.1. A cable clip will be bundled for securing and stabilizing the cable to a strap when the camera and computer are connected.

Anyone know if the 24p is 23.976 and or 24p? Or if there is a 2160p with 3840?

Videos

Want one! How soon they will ship?

Another interview

Does the OM-D E-M1 Mark II offer the best image quality of any Olympus camera?

Yes! Dynamic range is better, and also noise is better. So the OM-D E-M1 Mark II definitely offers the best overall image quality of any Olympus camera to date.

http://www.photographyblog.com/news/photokina_2016_interview_the_olympus_om_d_e_m1_mark_ii/

Olympus Interview, Photokina 2016

Good interview (overall for any management interview)

Q - Regarding sensor resolution – Why did you choose a 20mp sensor?

We are always looking for the best balance between high resolution and noise performance, and it’s a balance. Total image quality is important.

No one actually asked them, they just have to select Sony sensor :-)

Q - Can you take hi-res shots handheld?

No, not yet, it has to be extremely precise, as it is moving the sensor as a sub-pixel lens.

The right thing to do was to use larger shifts, record special info in EXIF and supply automatic align in software.

Q - Can you tell us more about the 20mp sensor in the E-M1 Mark II?

The 20mp Live MOS sensor, different to the PEN-F, with Phase Detection focus on chip. There's a new processing engine, the TruePic VIII – giving higher image quality, there is a 1 stop noise performance improvement over the E-M1. Performance should also be better than the PEN-F due to the new image processing engine. The Auto ISO range is now up to ISO3200 (by default), when it used to be ISO1600, as we are happier with the noise performance. The camera also goes down to ISO64, although this is at a lower dynamic range. ISO3200 on the E-M1 is equal to ISO6400 on the E-M1 II.

On Dynamic range, we have compared the dynamic range to the competition, and the E-M1 Mark II at ISO200 gives 4.2 steps, which is better than the E-M1, (3.8steps), and APS-C cameras such as the Canon EOS 7D Mark II (3.5 steps), and Fujifilm X-T1 (3.5steps).

Dynamic part thing make little sense.

Where is no such thing as "TruePic VIII" outside marketing, as they use Panasonic LSIs.
I also have doubts about sensor performance, as most of it lately is achieved by heavy noise reduction, even in raw.

Q - How did you improve the AF system?

We needed to change everything in the camera, change the EVF, and sensor engine, so that’s it’s possible for the shooter to track the subject. The EVF delay is normally a problem, but we have improved this with a 120fps refresh rate and response time of just 6ms. Making it very close to an optical viewfinder. You can shoot at 18fps, and we also show the image between blackout, so you can continue to see the live-view, not just the photo after it has been taken.

From this Olympus have nothing to do with sensor and EVF panel. Of course they made big work with firmware actually making it work at max.

The E-M1 II has a 2x larger buffer than the E-M1, a processor that is 3.5x faster, plus a 3x faster readout from the sensor, as well as support for UHS-II cards so the images can be written to the card quicker. Normally an update would be just the sensor, or just the processor, or a few parts of the system, but we had to change it all to improve the performance.

So, LSI is by Panasonic, memory most probably by Samsung or Elpida, and sensor from Sony. But we must prize Olympus?

https://www.ephotozine.com/article/olympus-q-a--olympus-om-d-e-m1-sensor-size-trip-29987