User blog comment:Kogath/Monster Hunter: World Discussion/@comment-25083735-20190730192528/@comment-25083735-20190730215637

The icon for Zorah and the guiding lands look suprisingly similiar, and Im pretty sure there was a trophy for "successfully guiding zorah magdaros". On top of that, the commander said that it going out to sea would create a massive new ecosystem. I wouldnt be suprised of zorah died, forming into a massive "tower" like arena, and ruiner nergigante indeed does have bio energy spikes from eating the dead zorah. It is also entirely possible the "everwyrm" is dalamadur, and it killed zorah.

Either way, it feels kind of weird to make the whole base story about zorah magdaros and then just drop him from the game like that.