User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-26074976-20130906011851/@comment-4517572-20130906032325

I think it was Fujioka that confirmed there are monster(s) that won't be announced until after the game has released. They aren't going to spill all the beans obviously, they want to leave some stones unturned for the players.