According to Nikon Rumors, Belgium store PCH has posted a facebook status and on their website about upcoming product announcement on Monday, October 19, 2015.
Nikon D810S
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Nikon D810S with Improved High ISO to be Announced Soon ?
According to latest rumors from NikonRumors, in next several weeks or months, Nikon will announce a new Nikon D810s full frame DSLR camera. The main new feature of Nikon D810s is improved high ISO / Low light performance, better than Nikon D810.