According to the conversation on Twitter and the printed magazine, the movie of Toaru Majutsu no Index (とある魔術の禁書目録) will be premiered in Japan in February 2013. The original announcement of the movie adaptation of the series was made in October last year while we were still discussing about the possibility of a new season of either Index or Railgun.
The original story of the movie will be written by Kazuma Kamachi (鎌池 和馬), the productive author of the series who launched another novel earlier this year. As for the staff list, J.C.STAFF will be responsible for the Anime production as the TV Anime. Hiroshi Nishikiori (錦織 博), the director of the TV Anime remains his position and Hiroyuki Yoshino (吉野 弘幸) again will be responsible for the series composition. Hiroyuki Yoshino was well known for his work of Guilty Crown and Accel World, and also reported working for the new project Vividred Operation.
We can see most of the familiar names are included in the list if you read Japanese. As for what to expect for the movie, well, you probably won’t come up with an expectation that another interesting announcement to be made at the end of the movie.
In the story, just before the completion of the Academy City space elevator “Endymion,” the main characters Kamijo and Index encounter a level 0 girl named Arisa. The Magicians are after Arisa, and they attack Academy City. A female leader named Shattoaura leads a unit from Academy City against the attack. Kamijyo and Index learn from Stiyl that Arisa is key to a brewing war between the sides of Magic and Science. (via ANN)