User blog comment:Kogath/Monster Hunter Online Discussion/@comment-184612-20150507162748

There's a couple NPCs in partial Plesioth armor in Mezeporta. The main Bowgunner NPC also ends up with a full set of it and the Plesioth Bowgun later on in the story. If this isn't a hint Plesioth will be in the beta later (they've already said the boat combat will show up later on in the beta), then I don't know what is.