Collects Uncanny Avengers #6-11 & #8AU.The future begins in the past! The beginning of the end looms as the Apocalypse Twins debut! Why do they seek to anger the Celestials? What is their connection to Kang? And how is Thor responsible for their mighty power! As Apocalypse's Ship attacks S.W.O.R.D.'s Peak station, a Celestial meets a shocking fate, and the Four Horsemen of Death are unleashed!