User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-6050823-20130619041927/@comment-4815503-20130619175256

Looking forward to the scans. It sounds like we may know much of what's in them, but getting images of the new area will be nice.

If Agnaktor indeed returns alongside its minions, we can cross Leviathan off of the monster types yet to show up, not to mention one that's an excellent example of combat on land. Agnaktor is also a great choice given the new emphasis on elevation differences, as Cottonmouth225 touched on.

Off the top of my head, that really only leaves Brute Wyverns as only significant Gen 4 monster type yet to show up, and I think their inclusion is quite likely, be it in the form of Deviljho, Duramboros, or something new. Of course, there's still the question of Carapaceons and Piscine Wyverns from earlier generations, but still, this game is shaping up to be an incredibly diverse installment in terms of monsters.