I can clarify for you. The first time around, I waited 6 months, the time I consider a game to most likely be abandoned, from when we last had an update from Ferdafs before I put anything out (we haven't hit 6 months yet). At the time, that had been the longest gap in game updates, and seemed reasonable that the game might be abandoned. Eventually, it took Ferdafs 9 months to put something out, but the game did continue (with only two updates this year, but still, two updates, not abandoned).
I've said many times, that my goal is not to continue the game on my own. It is to conclude it (if indeed Ferdafs is done) or port stuff over if he keeps making it. This means, the main way I want to release content, is to port the stuff Ferdafs is doing, not put out my own. The conclusion is the backup, the fall back, not new content.
In Jan, that will be a 6 month gap. I'll most likely release Part 7 and I can focus down on Part 8. Then people can ask when that will be ready...