User blog comment:B214/General discussion/@comment-31987335-20181205002914

February is the earliest or maybe April if following release schedule pattern. The only information we have on Vol 16 is what was mentioned in Vol 15 afterword. It mentions that next volume will focus on Ikki's former rivals back in Japan. Serious thing is happening in Japan and Or-Gaule was mostly responsible for it. There was already a hint of it at the end of Vol 13 when Shizuku mentioned it.