https://www.techradar.com/news/more-rumored-specs-for-nikons-new-mirrorless-cameras

With expectations growing that we'll see a full-frame Nikon mirrorless camera in the not too distant future, NikonRumors.com has published the first set of specs it believes two new cameras will feature. Yes, you read that right: two new mirrorless cameras, not one. 

NikonRumors reckons could see one model with a 45MP sensor (likely very similar in design to that found on the D850), while the other model will feature a 24-25MP chip, although it's not clear if this will be full-frame or APS-C.