I think we can all agree this is to much for an oversight, combined with the fact that kley still refers to the nightmare were pig as an NPC, I have a little though about the wole situation.
What if in future updates, maybe even the next one, the nightmare werepig is actually an npc, maybe after defeating him we will be able to interact with him via an amulet, covenant, etc etc or whatever mechanic kley adds.
I could be completly wrong and both the setting and statue will be added on the next hotfix but i think it was worth making this post.