My second idea is an Chinese styled area or an area styled like a foreign country containing come kind of jungle, desert etc, it can come with a ship from that country like a Chinese ship etc. This could come with a new curse of cosmetics for doing stuff there. Maybe villages styled like abandoned outpost or plenty if skeli islands.
My first idea is a skelington realm, filled with all kinds of skelington ships, and forts etc, the place is foggy most if the time too, and plenty of jagged rocks.