The Nintendo Mystery

Wherein a picture is worth three words.

And those words are –

What’s this from?

During all the E3 hullabaloo somebody uncovered this picture on Nintendo’s website. It wasn’t shown in anything at E3 that I’m aware of, and it’s not referenced from any page of a specific game.

So what the hell is it?!?

Holographic fishing simulator? Virtual koi pond? Some trippy new RPG?

I’ve got no idea. Anybody out there have a guess?