According to Natalie, Kumeta Kouji's manga Katte ni Kaizo was announced to get an OVA anime adaptation. The first volume will be released on April 27th. The production studio is Shaft and the general director is Shinbo Akiyuki.

Katte ni Kaizo anime official website

Release dates:
1st volume: Apr 27th
2nd volume: Jun 22nd
3rd volume: Aug 24th

Katte ni Kaizo had been serialized in Weekly Shonen Sunday from April 1998 - July 2004. The art and the satire of Sayonara Zetsubou Sensei were originated from this series.

Staff
General Director: Shinbo Akiyuki
Director: Tatsuwa Naoyuki
Series Composition: Takayama Katsuhiko
Character Design: Yamamura Hiroki

Cast
Katsu Kaizo: Sakurai Takahiro
Natori Umi: Kitamura Eri
Tsubouchi Chitan: Saito Chiwa
Saien Suzu: Toyosaki Aki

Blu-ray box sets of Sayonara Zetsubou Sensei series were also announced. The first season box set will be released on March 23rd.

Second Season box set: May 25th
Third Season box set: July 27th

Sources: Natalie, Scan of WSS, MyCom Journal