From Nintendo Direct:

Donkey Kong Country: Tropical Freeze: The first Wii U instalment in the franchise comes from Retro Studios. The side-scrolling platformer has beautiful HD graphics that show fine details, such as Donkey Kong's fur. Dixie Kong joins the adventure, which features the Kongs swimming underwater and moving from the foreground to the background. This time, the camera changes perspective on certain levels to enhance the sense of motion and to deliver new experiences. The game is scheduled to launch towards the end of this year.

After saving the island in Donkey Kong Country Returns it seems that Viking animals have invaded. More Donkey Kong Country is definately a good thing and is in safe hands with Retro still on board.