If this new leak can be trusted, then a new Picross game could be coming very soon. And this time it's based on The Legend of Zelda, a perfect pairing.
The game was discovered by Cellenseners while looking through the Nintendo US and UK servers. Apparently he found more than just the above pictures. Being on the official servers lends more credence to their being real.
This version of Picross is going to be offered as part of Nintendo's new loyalty program that's scheduled to become fully active later this month. The idea is that you'll be able to get this game by redeeming any acquired My Nintendo points. It will be interesting to see how they integrate the new rewards program and whether or not other mobile games, and in-game purchases, will be part of that program.