The closest thing I could find on that is this from the artist's site, via Google Translate:
"And summer Komi participation!
Place the third day (month) K-45b is. However, it was not possible to prepare new book. So we will have one street backlist, that over thank you."
So I'd expect winter Comiket at the earliest. I highly suspect this chapter will be quite lengthy, so of course it'll take some time to get finished.