The possibility is high that other than D5, Nikon has another high-end/premium compact camera to announce in early 2016. However, the rumors swirl with the news that a new camera with a large/larger sensor (1″ and/or APS-C) of Nikon is under development. Nikon’s main aim to create this camera is for the advanced/semi-professional photographers.
By the way, the name of the camera is still not known.
Via-Nikonrumors