Oh, wouldn't this be nice? On Tuesday he says something like "For our 200th post, lets show off two new challengers!" and we get Yoshi advertising Yoshi's New Island and Wario advertising Game & Wario on the Wii U. It would make up for all the crushed expectations, for me personally, and we'd be back on schedule for 2 characters a month! Of course he owes us nothing, I'm just glad we're getting a new game and we're slowly approaching E3 but... it sure would be nice~
What's more probable is he has a normal pic of the day, and then follows up with a miiverse comment like "Wow! This our 200th post! Time flies when you're having fun."