Since the 2006 seires and its 2011-13 Side A spin-off were adapted into 2009, 2012, and 2014 manga, fans have speculated/hoped that the news might be about another anime.
Square Enix’s twice-a-monthly magazine Young Gangan (out the first and third Friday) is teasing that the issue out September 2nd will feature a major announcement concerning Ritz Kobayashi’s school girl mahjong manga Saki.