I like your idea of having continuing endings in the game. Maybe as secret ending that happens when certain conditions are fulfilled? The devs think about to add reencounters with bosses. In case Chiro gets kidnapped by the tribe she will rematch the bear boss. Depending on who will win there will be two different endings. If Chiro wins she is free (good ending). If the boss wins... well in this case we just can pray for her (bad ending).