From http://mynintendonew...g-a-new-engine/
We know that Retro Studios is hard at work on their next project since releasing the fantastic Donkey Kong Country: Tropical Freeze. We knew that much since February last year. However, Liam Robertson from Unseen64 has tweeted that after doing a bit of digging it turns out that their next game for Wii U will be using a brand new engine. It’s unlikely they would be using a new engine if it was another game in the Donkey Kong Country line. New Metroid anyone?
Did a comb of Retro Studios devs. Nintendo must have them on a tight leash, but it's a Wii U game with a new engine. New IP or Metroid?
Thanks Ryudo.