This just came up in twitter feed.
http://www.katanagatari.com/news/
They're reairing Katanagatari starting April 2013 in Noitamina block.
Also there's going to be a Blu-ray box coming out.
Yeah about that Blu-ray box... Under the extras it lists "Creditless Opening(s) - First airing version".
I wonder if that means the re-airing is going to have new OPs.