Then lets hope that Houken wont show up.
In his current super-exhausted state Shin might not have enough stamina for another major fight and not enough time either way. Narrative-wise it also would feel off to have a couple of Houken fight chapters now.He can reappear in the aftermath to allow the Zhao get away and chase after Shin or whatever (i still hold on to my theory that the Zhao somehow will win, but that the city has fallen in their back meanwhile)
Shin fought off Houken after 7 days of continuous fighting. Granted, Houken has handicapped but Shin even more so. In that sense, Kingdom is very much like a Shounen.