From animenewsnetwork: Band blogs About Bleach's Last Season, Deletes Mention.
The ratings were down. There hadn't been talk of a filler and the series was really catching up with the manga. It seems to follow. Maybe this is a break? I was never a big fan of the anime as much as I love Morita-kun and Non-tan and other seiyuu and so many other things about the anime and as much as I'm looking forward to tomorrow's crack!ep about the Halloween spread. Probably too early too mourn and the band just made a mistake but ... hey, it's not unlikely. *prepares self and clutches manga volumes* This happens. Could be temporary. The anime could resume after a hiatus.
ETA: Rumors Denied. On Twitter, zack_mori (aka as Morita Yosuke, assistant recording director of the Bleach anime) wrote "The airing schedule has been fixed far in advance and it won't be ended soon." His tweet is here