According to Kadokawa official website, an anime movie of Sora no Otoshimono
was announced. The details will be given in Newtype magazine December issue to be released on November 10th.
Source: Kadokawa Comic
Updated on February 15th
According to Oricon news, SoraOto movie will be premiered this summer. The director is Yanagisawa Tetsuya ("Kannazuki no Miko