User blog comment:Kogath/Monster Hunter: World Discussion/@comment-6050823-20180401132534/@comment-6050823-20180401135043

^

They weren't sure what Nergigante was. From few sightings of it, and most witnesses dying after one attacked, it was hard to say what Nergigante really was. It was an unclassified monster, at a time, before it was finally seen in the New World during the Elder Crossing.

Yeah, I'm still really iffy about it, and all the other new Elder Dragons in MHW, as it is since they don't really detail much about it.