Board Thread:MHX General Discussion/@comment-25706585-20151029144357/@comment-27120688-20151029172647

Its probably there, the game isn't specifically advertizing previous features, specifically maps and monsters. The only thing famitsu has done for returning content was show that Zinogre, Tigrex, Brachy, and Rathalos were all returning when the game was announced. All of the returning maps were only seen in trailers or magazine previews, new maps (the older maps) are the only ones that have been strictly advertized.

That being said, we just got back amatsu's map, so i'm sure there are plenty of other maps hidden.