Sequels
Rumours of both the feature film adaptation and a sequel to the original story have been circulating since the original release.
Neil Gaiman has said a sequel to the book titled The Seven Sisters is a possibility. In Neil Gaiman's short story collection Fragile Things, when commenting on his novella The Monarch of the Glen, a novella that follows up on Gaiman's novel American Gods, he comments that a novella-length story in the world of Neverwhere, How The Marquis Got His Coat Back, remains half-written.
Read more about this topic: Neverwhere