Idk how viable and time consuming would be to actually make this, but I think a connection between the Fog Gulch and the Stormy Coast would be a really good match in terms of map design, the two regions communicate really well with their overall themes and they could offer a really nice flow of platforming: the coast is stormy cuz there's a massive ever lasting cloud on top of it, similar to how the cidadel is shaded cuz of the structure that is super. Would also be consistent with the blue hue of the coral caves. Idk, it's just food for thought.