DC has been exceptionally tight-lipped about its upcoming November story Doomsday Clock , which introduces the iconic characters of Watchmen into the main DC Universe for the first time. During a panel for the comic at New York Comic-Con, writer Geoff Johns lifted the veil and explained why the publisher has been secretive about the 12-issue miniseries. Johns spoke with Lev Grossman–an expert on all things Watchmen and the author of The Magicians series –as to just why readers are being kept in the dark about the upcoming book.