User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-5029315-20130312160201/@comment-6050823-20130315220538

Actually the theme playing through out,the TGS 2012(After Jhen whatever popped up) and the last half of the Nintendo Direct Trailer,sound similar to this from TGS 2012 http://www.youtube.com/watch?v=QdMvpPLa-ZM&list=UUSuj_z7NMWqHQt1aGUFzHVQ&index=10 13:53.So this could be the Ruins Field's Theme.