An apparent leak reveals the possibility of a new series of sublime if abstruse parody anime Sayonara Zetsubou Sensei, which would bring the successful franchise up to its third season.
The source goes so far as to offer the date for the airing of the show as being July.
The particular board this rumour emanates from is apparently inhabited by at least one industry insider, whose numerous leaks have mostly proven correct. Thus observers are happy to consider the probability of this rumour being true to be quite high.
You can see the track record of the mysterious source below:
|Zetsubou Sensei from July||Unknown|
|Negima continued by Shaft||Unknown|
|A Certain Scientific Railgun in 2010||Actually due 2009|
|Fullmetal Alchemist cast to differ substantially in new series||Correct|
|Munto to be 9 episodes||Correct|
|Basquash air details||Correct|
|Strike Witches II due 2010, to be based on light novel||Correct|
|Haruhi to be broadcast as mix of new and old episodes||Unknown|
|Shangri-La (Range Murata anime) to be 24 episodes||Unknown|
|Asura Cryin’ to be broadcast as two seasons over spring and autumn||Unknown|
|Seitokai starts July||Correct|
|Omamorihimari to be animated in 2009||Correct|
|Seiken no Katanakaji produced by Manglobe||Unknown|
|Hetalia air details||Correct|
|Spice and Wolf second season starts July with 12 episodes||Correct, but episode count unknown|
It would appear the leak is highly reliable.
You can see the original 2ch exchange preserved here.