Avengers Forever — Kurt Busiek

Seven timelost Avengers plucked from the past, present and future must protect longtime ally Rick Jones from death at the hands of Immortus, Master of Time. To find out why Rick Jones has been targeted for elimination, the Avengers join forces with Kang the Conqueror, one of the team's deadliest, most implacable foes and the ancient Immortus' younger self, as well in a cosmic battle that stretches from the Old West to the End of Time. And as they do so, they discover that they're fighting not just for one life, but for the very destiny of mankind, against a greater foe than they could possibly imagine! Collects Avengers Forever #1-12.