User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-21371438-20141016211747/@comment-11537809-20141017164621

Pretty sure that rusted Kusha works just like Ivory Lagi in 3g/u in that they are the final boss of the extended story of the game and still have more quests afterwards such as the Deviljho/Mark of a Hero/Alatreon urgents in 3g/u and therefore this triple extreme quest can still come afterwards. Iirc, people have also confirmed of 10* quests after Rusted Kusha, still relooking for article about extreme blos,seru,jho.