The images of the top and front drawings recently appeared in the recent FCC filings. We know the new model will have a 20.3 MP CMOS Censor as well as WiFi 802.11n capabilities and if history is to repeat itself will run the Tizen Operating System.

Traces of Tizen OS have already been found in the NX300 firmware as detailed below:
 
Samsung-NX-camera-Tizen-OS-2

 

Source Photo Rumors