After the french magazine rumor, Nikon rumor is also saying that Nikon D4 is coming on January 2012.
Nikon Rumor today also published some high ISO cropped Samples of Nikon D800, however no exif details are attached with the crop samples,
According to NR
I have mentioned before that I have several samples taken with the upcoming Nikon D800 camera. The TIFF files produced by the Nikon D800 are around 103 MB…..Unfortunately I cannot publish the entire images online but I can show you few JPG crops taken at different ISO settings.
The samples are copped area of some solid part and its hard to predict the quality of image coming from a pre-production Model, but the details become flat at ISO 1400 and Noise is visible from ISO 3200.