Monster Hunter mod suggestions

So, I'm working on a Monster Hunter themed mod, already have different weapon types, melee and ranged, and monsters, but I want to work on ambience and biomes and have no idea where to start. Thinking of completely new biomes on a different dimension

So I want to ask you biome ideas to work out of, and I could implement the monsters where I see them fitting

Where should I start? The Bherna plains? Loc-Lac? Pokke the Arctic Ridge?