User blog comment:Bowser & Jr./WARNING! CHALLENGER APPROACHING! - September 26, 2013/@comment-26124383-20130927012337/@comment-3396321-20130927102643

...Villager and WFT, along with Megaman were in June. Luigi was in August.

Peach's birthday was on her announcement, and WWHD is out physically soon.

It seems they're doing at least one, depending on what event is going on/game coming out.

Don't forget there's like 45 characters in the game. And there's more to the game than characters. It should release when we all believe.