"I wonder what kind of game it is? I hope to introduce it to you in the not so distant future."
Nintendo of America president Reggie Fils-Aime said in September that Retro's Wii U game will be "fantastic."
"Rest assured that Retro is working on a fantastic project," he said at the time. "We've got big games in development that are coming that are going to continue to drive the install base of the system."