If I had to guess (since he was supposed to only do it for half a year) this CITY run will probably end when there's enough to make another full volume 9-10 chapters from now. He'll probably resume Nichijou a couple of weeks after that
Where does one obtain this special edition of the new volume outside of flying to Japan? Asking for a friend...
Edit: Forgot Google existed for a second
For the supposed black sheep he still seems to have all the Tanabe resources to create a Saw trap. Really hope Awari digs into the Tanabe family beyond the "missing" grandfather in future chapters
The man in the mask is Tanabe's "good for nothing son" according to Granny. They confirm this in Chapter 52 after reaching his floor in Tanabe Tower. They also confirm he's the captain of Caps Lock (CITY South's rival team) in Chapter 109 when Gongenyama reveals himself to be a spy and in...
Not to be a total nerd about CITY, but Ch 182 reveals that Granny was Student Council President when Hotaka was VP. The two of them pushed back against each other to "restore the school to its former glory". Its also implied that Hotaka had the hots for Granny in high school but decided to serve...