The AnoHana movie: Ano Hi Mita Hana no Namae wo Bokutachi wa Mada Shiranai Movie, which is set to premiere in summer 2013 has updated its website to include some new interesting information. The movie itself would animate a sequel, set one year after the events of the final episode of the anime. The film will still have its initial retelling of the show from Menma’s point of view, with the addition of the new sequel animation. Whether the new sequel animation will be part of the movie have yet been revealed, so keep those tissues ready until more information comes along.
Props to Dtshyk at MyAnimeList for this information, and the official website and information is located here.