So, details are thin on the ground, but somebody spotted today that on the PEGI (info: ) website there is now a listing for Minecraft Wii U Edition: (text in square brackets is added to make the thing make more sense)

Minecraft: WiiU Edition
[Publisher:] Microsoft studios
The content of this game is suitable for persons aged 7 years and over only.
It contains: Non realistic looking violence towards fantasy characters - Pictures or sounds likely to be scary to young children - Non realistic looking violence towards characters which although human are not very detailed -
System: Nintendo Wii U
Genre: Puzzle
Release[ ]date: 2015-11-12

Link: pegi.info (URL stretches page)

It's quite notable that the release date states that it's to be released today. (note: I live in the UK so today is the 12th).

UPDATE: There was nothing in the Nintendo Direct about this. More information as it emerges.