Monster Games, known for its three Excite series Wii titles and the more recent Pilotwings Resort for 3DS, is developing the recently announced Donkey Kong Country Returns update for 3DS, an Australian classification has revealed.

Retro Studios, the original developer also known for its Metroid Prime titles and Mario Kart 7, is currently working on its debut Wii U project.

Thanks, NeoGAF.