http://www.ao-full.com/new-project
Falcom's new Evolution project site opened.
Evolution games have been enhanced Vita ports of Kiseki (Trails) series with various additions like full event voice, arranged BGMs and added sub quests. They have release Zero no Kiseki and Ao no Kiseki Evolutions on Vita.
The new teaser page's background hints that the new evoultion is most likely Sora no Kiseki (Trails in the Sky)