http://imepita.jp/20100728/465230
Nisio Isin's 3rd anime project.
For those who are unawared, this is the prequel to Bakemonogatari, as such only Shinobu, Araragi, Hanekawa from Bakemonogatari will be in it, but will have various other characters not present in Bakemonogatari.
Who did not expect this?
[Mod edit: Movie confirmed]