The end is here! Or, is it a new beginning? Massive climatic disturbances are wreaking havoc with the planet — underwater volcanic eruptions, tidal waves crashing over whole cities and snowstorms burying entire countries—and even the assemblage of the Ultimate U''s mightiest is no match for this worldwide destruction! Featuring Spider-Man, the Fantastic Four, the X-Men, the Ultimates, the Hulk and more, find out whose lives are at stake in this defining moment of truth for the Ultimate Universe.