Uncover the earth-shattering secrets behind the extended Marvel universe too big and too shocking to be contained in the main Original Sin series! Everyone has a deep, dark secret - from the Avengers to the X-Men to everyone in between. Truths hidden for years. The omniscient cosmic being known as The Watcher has borne witness to every event and every secret in the history of the Marvel Universe. But now he's dead, and the knowledge he's collected has been released. And those secrets are about to come out.