While speaking to iGamer, lead designer Jens Bergensten mentioned, that though not completely impossible, it was very unlikely that Minecraft would be making its way to the Wii U.
In the interview he also stated that once Microsoft’s exclusivity deal for Minecraft runs out they were looking to consider releasing Minecraft on other consoles.
Microsoft has an exclusivity deal for consoles. When it runs out we’ll consider Minecraft for PlayStation, but Wii U is very unlikely.
Hopefully something changes because the possibilities of Minecraft and the Wii U Gamepad coming together could be very interesting.
Update: Jen Bergensten has responded to the media storm surrounding his statement by altering what he said to something less dooming.
The reason I said that is that the Wii U hasn’t even been mentioned when we’re talking about Minecraft platforms. However, I’m only responsible for the PC and Pocket editions, so the question wasn’t mine to answer. The Wii U is no more likely than any other platforms, but no less either.