I somewhat assume that they're going to end it off around 23. When's chapter 21 coming out?
Spoiler for Speculating until then!:
21 would still involve the fight, though it's more based on explanations of the 'memory inconsistencies', the creation of Juubey and such.
22 would involve the fight, though Kazumi gets an upper hand until Umika/Kaoru become witches. Epic magic fighting though Kyubey would still be trolling.
23 would conclude everything- the end of Kazumi's life, Hijiri dying (or most likely turning into a witch): then the aftermath with Tachibana and Detective-san.. Maybe a sweet epilogue?
