This is a photo of an Austrian registered prototype being tested. The frame, single disc at the front and the swingarm from the small Duke family are distinctive for this Ktm 390 Duke Supermoto despite the camo paint scheme. The suspension travel and the height of the saddle seem greater. The silencer is standard this time not under-slung. 
Thus a new line of 125/200/390 Supermotos or even Enduros later on based on the Dukes, is very possible. The new bike should provide a different riding position and that could be the greatest difference on the road compared to the current Duke line. 

Comment: The Dukes cannot forget their supermoto roots!