Nikon D800 is coming with 36 Megapixel on Oct 26, and Nikon D4 is coming on Feb 2012 with 18 Megapixel sensor, see more here (Nikon D800 and D4 rumor update), According to SonyAlphaRumor Sony may use the Nikon D800 sensor(made by sony) in its upcoming Alpha99 / A99 Fullframe camera. The exact release date has not been chosen yet but there is a huge pressure to release it as soon as possible. Compared to the Nikon D800 the Sony A99 will have slightly different specs and a lower price.
Well in my view to beat Sony NEX 5N low light performance, Sony should use Nikon D4(Upcoming) 18 Megapixel Sensor in its A99 camera.
