User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-26564400-20150716115144/@comment-190.221.90.142-20150717190051

All new batches are released 2 months after they are released in Japan. We're always 2 months behind on new content and have been since Kira's batch. As for old units, it's closer to 3 months, they don't have a shceule or tentative date, it's up to Gumi to decide whenever.