In the wake of Infinity, Captain America and Iron Man plan for the next version of the Avengers. But they're soon interrupted by a visitor from the future carrying grim news: a runaway planet is on a straight path for Earth. As the team scrambles for a solution they barely understand, new mysteries burst from the time stream. The Avengers face themselves-- again. Will their cofrontation rival the X-Men's? As the Science War overtakes the world(s), what is the secret behind this time-tossed team?