Nintendo has been placing sly references to its off-the-wall cult classic The Legend of Zelda: Majora's Mask a number of years now – the most notable recent example was the presence of the titular mask on a wall of Link's house in The Legend of Zelda: A Link Between Worlds for the 3DS. Not to be flogging a dead horse or anything, today it's added to the speculation with the interesting artwork you've already seen in this article. If you haven't, it's just above these eloquent words.
The artwork was sent to Club Nintendo members earlier today and depicts Link in traditional Japanese garb with Majora's Mask perched on his forehead. The piece is to celebrate the Sumidagawa fireworks festival in Japan, and whilst masks are very common in traditional Japanese culture, there really is no necessity for Link to be wearing that particular mask, when he has various others as options.
It's a conundrum – is Nintendo trying to give us yet another clue about Majora's Mask coming to the 3DS, or is it simply toying with us as it so enjoys doing? Whatever the reason, let's just hope that mask doesn't slip – we don't need the moon crashing down on us this close to the release of Hyrule Warriors.
You can download the artwork as a wallpaper right here if you so wish.