Apparently a Wii U version, which interacted with the 3DS version, was in the works before Konami ditched it in favour of a Wii U version of Lords of Shadow 2.
The Wii U version of Mirror of Fate would have been the same game as the 3DS version, with the tablet controller's touch screen acting as the bottom 3DS screen and your telly acting as the 3DS' top screen. You were able to use the Wii U's forward facing camera as a mirror to "capture your reflection and reveal your fate".
Now, though, Wii U owners will have to settle for a "safer" port of Lords of Shadow 2, which could retain some of the planned connectivity with Mirror of Fate. Both games are being made by Spanish developer MercurySteam and will be unveiled at E3 next month.