Based off a translation from Spanish site Neverwinteros, IGN reports that a new Neverwinter Nights 2 expansion is in development. Obsidian confirmed that the expansion, called Storm of Zehir, will include full party customization and "free exploration of a non-linear game world via an Overland Map."
Players will take control of their party during a post-war economic recovery period, choosing whether to ally with syndicates or obtain items through nefarious means and sell them on the black market. There's currently no announced timetable for a release.
[Via Big Download]