Dan Connors, the CEO of Telltale Games has said that, while they are “not working on” The Walking Dead for Wii U, that “doesn’t mean [they] wouldn’t do it]”. He explained that:
…it would be a nice opportunity, so we’ve just gotta kind of watch that a little closer. Getting involved with a launch platform involves a lot, so we’re in the process of figuring that out with Nintendo.
And considering I recently watched every episode of The Walking Dead in a matter of days, I’d be quite happy for this to happen. But it sounds like any possibility of an announcement would be a while away at this point.