Seeing how the arc is playing out so far and where Hara is dedicating the chapters, can easily see the arc playing out between 70-100 chapters. Somewhere between Bayou - Coalition. Unless this is carrying over to the full end of Zhao, then another WZI on the way. For comparison, Sanyou arc (let alone the war itself) was only 55 chapters. We're already 22 chapters into the arc.
Character growth for Ouhon? Finally turning into a likeable character? We being humble? Graduating from dickhead with daddy issues? Betttt, i'll take it, even if just to manipulate Heki.
On a side note... Man 800+ chapters into the series, I still can't stand these two out of all the sub-commanders of Qin, idk if it's their faces or their attitudes or the combination of the two, but everytime they appear it's like"fuuuckk... " like Hara why would leave this bum Garo in the series but kill Gakurai... sigh:
Ong everytime i see this mf with a slanted horse, nightmares to that terrible scene pop up immediately.