Collects Uncanny Avengers #18-22.Welcome to Planet X, the new mutant homeworld, where everything is great - if you possess the mutant gene! The Wasp is the last human alive, relentlessly pursued by Magneto's All-New X-Force, and protected by her husband Havok! Now, as Kang's Chronos Corps arrives on Planet X with a terrible offer, the former Unity Squad members must reunite to defeat the Apocalypse Twins and avenge the Earth! But even with a time traveler on their side, is it too late? Which of the seven prime futures will become dominant? And what is Kang's hidden, ultimate goal? This is it! The conclusion to an epic two years in the making - and rest assured that nothing will ever be the same again! Kang's ultimate revenge is revealed, as the Avengers Unity Squad unite entirely in humanity's darkest hour!