User blog comment:Kogath/Monster Hunter: World Discussion/@comment-24734669-20190510001902/@comment-4370375-20190510164128

It seems like Iceborne is going to be a fusion of both a G rank version game with a Frontier style expansion especially since unlike past G Ranks which can only ever be purchased as separate games with GU mitigating this via the save transfer feature, Iceborne can be purchased as just an expansion for those who already have World.