The Sora no Otoshimono feature is shaping up after getting the reveal about it last year and the teaser for it at the end of the last episode of the Forte season and now via Oricon, the director for the feature film has been revealed as Tetsuya Yanagisawa. Yanigisawa directed the first season of the TV series (while Hisashi Saito directed the Forte season) and the intent is to have it out for an early summer release.
Yanigisawa has been involved with a number of anime series over the years as a director, from Devil Lady and Eat-Man to Strawberry Eggs and Vision of Escaflowne.
Story concept: Sora no Otoshimono: The Movie (Gekijoban Sora no Otoshimono?) will focus on the Hiyori arc of the manga.