Given the popularity of Attack on Titan here in North America where it is the #1 manga property according to ICv2’s survey of manga sales (see “Top Ten Manga Franchises”), it should be only a matter of time before the Attack on Titan: Lost Girls manga is released here.
The Anime News Network also reports that there will be an important announcement next month concerning another Attack on Titan spin-off, Saki Nakagawa’s Attack on Titan: Junior High comedy manga. Kodansha has now published three volumes of AoT: Junior High series in English. Could there be an anime adaptation in the offing?