Plans have been announced to re-release Attack on Titan as a pair of theatrical compilation movies. Due in the fourth quarter, Guren no Yumiya covers the first 13 episodes. Then in 2015, Jiyuu no Tsubasa covers 14-25.
A 5.1ch audio remaster is being produced for the features.
【速報】劇場版「進撃の巨人」前後編にて公開決定！！劇場版「進撃の巨人」前編〜紅蓮の弓矢〜は2014年冬公開！ #shingeki— アニメ「進撃の巨人」公式アカウント (@anime_shingeki) April 3, 2014