User blog comment:IceFireWarden0/Next Official Elder Scroll's Game Predictions/@comment-16219425-20121128132826/@comment-4705438-20121128134959

Black Marsh would be, indeed, an interesting place to explore, hiding many secrets, waiting to be found. BUT! Most of Argonia is considered inhabitable by other races. The only way to show the March would be cropping out some areas and leaving the most of it closed. This is how it will work in TES:O.

I don't think we will ever visit Akavir, unfotunately.