According to Switch magazine vol.30, Shinbo Akiyuki has revealed that the anime projects of Nisio Isin works will continue up to the tenth.
Nisio Isin Anime Project official website
Nisio Isin Anime Projects Announced so far
1st: Bakemonogatari
2nd: Katanagatari
3rd: Nisemonogatari
4th: Kizumonogatari
(Medaka Box is not included because Nisio Isin anime projects are run by Kodansha.)
Shinbo said he wanted to produce an original anime written by Nisio Isin as the tenth work.
Source: Scan of Switch
