The expansion's been in the works for a year now. Seeing that the million-plus strong Neverwinter community was screaming for a new adventure set in the Underdark, the setting was an easy choice for BioWare. But as simply adding new locations isn't their style, BioWare has also decided to add plenty of new monsters, classes, plenty of feats and skills and lots more besides. Beyond this, Hordes of the Underdark will feature stronger ties to the story of the original Neverwinter.