There was a report two weeks ago that mentions that the second season of the anime adaptation of Sui Ishida’s Tokyo Ghoul will be 24 episodes long. Ishida has recently went on Twitter and revealed to fans that Tokyo Ghoul √A will actually be 12 episodes long, debunking the leak.
@Unknownbutcool あ、sorry、シーズン２は12エピソードだ（I misunderstood that you talk about total episode…!）
— 石田スイ (@sotonami) December 20, 2014
The upcoming second season will be based on a new original story written by Ishida, rather than adapting the remainder of his original manga. The series will once again be animated by Studio Pierrot (Naruto Shippuden, Bleach) and the majority of the cast and staff will return to reprise their roles. The second season itself will be airing from January 8 next year on Tokyo MX, before airing on TV Osaka, TV Aichi, TVQ, Dlife and ATX-1 in the subsequent days. There will also be an advanced screening session of the first episode on January 4 at the Toho Cinemas in Nihonbashi. More information about ticket purchases will be revealed soon.