The fate of the entire Marvel Universe hangs in the balance as Earth's mightiest heroes face their greatest challenge! Summoned across the stars by the mysterious and unbelievably powerful Beyonder, the Avengers, Spider-Man, the Fantastic Four, and the X-Men are set against their deadliest foes on the mysterious planet known as Battleworld - with the winner promised the ultimate prize. But as battle lines are drawn, new alliances are forged, and old enemies clash, one among them is not willing to settle for anything less than godhood.

Iron Man and Captain America are two core members of the Avengers, the world's greatest superhero team. But when a tragic battle blows a hole in the city of Stamford, killing hundreds of people, the US government demands that all superheroes unmask and register their powers. To Tony Stark - Iron Man - it's a regrettable but necessary step. To Captain America, it's an unbearable assault on civil liberties. 

Piloting a shuttle through a deadly solar flare, Jean Grey saves the X-Men, but is possessed by one of the universe's most powerful forces - the Phoenix. As she adapts to her new powers, the mutant team launches an assault against the clandestine organization known as the Hellfire Club. Once inside, however, Jean is tricked by the villain Mastermind into betraying her teammates. She becomes first the Hellfire Club's Black Queen and then Dark Phoenix, as the power to destroy worlds bursts forth uncontrolled.

Born to a rarified breed of Russian aristocracy, Kraven the Hunter had stalked and killed every animal known to man and considered himself the world's best big-game hunter. It was this confidence that brought him to New York years ago, in an obsessive quest to hunt what he considered the city's greatest prey: Spider-Man. But his target eluded him time and again, mocking him at every turn.   

Cyclops and Emma Frost re-form the team with the express purpose of "astonishing" the world. But when breaking news regarding the mutant gene unexpectedly hits the airwaves, will it derail their new plans before they even get started? As demand for the "mutant cure" reaches near-riot levels, the X-Men go head-to-head with the enigmatic Ord, with an unexpected ally - and some unexpected adversaries - tipping the scales!

Under secret orders to assassinate the Widow, Hawkeye, the rough-edged marksman, finds himself caught up in a violent prison break that releases some of the world's most vicious and powerful criminals. Defying his superiors, Hawkeye joins forces with the sultry Russian spy and a mismatched group of personalities that include Spider-Man, Spider-Woman, Luke Cage, Captain America, and Iron Man. 

In the aftermath of the superhuman Civil War, Captain America was shot down in cold blood. In the aftermath of his death, Cap's longtime partner the Falcon makes revenge his first order of business. Sharon Carter finds herself spiraling out of control, a captive of the Red Skull's minions. And Bucky Barnes, a.k.a. the Winter Soldier, must reconcile his own sordid past with the calling to become...the new Captain America!

Magneto, the X-Men's oldest, deadliest foe, has taken over a top-secret government installation that houses the Sentinels, powerful mutant-hunting robots. The X-Men must fight to keep this deadly technology out of Magneto's hands. But the Acolytes, Magneto's fanatical mutant followers, stand between the X-Men and victory - a victory that’s quickly slipping away - for a more ruthless enemy, the US government, holds the X-Men responsible for the installation's takeover!  

Betrayed by Earth's heroes and exiled into outer space, the man-monster known as the Incredible Hulk has landed on the distant planet Sakaar, ruled by the tyrannical Red King. Sold into slavery, the Hulk becomes the Green Scar, the planet's mightiest gladiator! But his new masters get more than they bargained for when he forges a bond of brotherhood with his fellow fighters: crafty insectoid Miek, the horrific Brood, wise rock-man Korg, Shadow Warrior Hiroim, noble-born rebel Elloe, and her loyal guardsman Skee. Together, these gladiators start a revolution.

Hydra has a synthetic pathogen that will make the entire human race dependent on them for the cure. A.I.M.'s newly developed nanotech compound to enslave humanity is dangerously close to contaminating the world's water supplies. Ultron is poised on the edge of Singularity, Earth's technology at his metallic fingertips. Dormammu has a plan to save the world - by claiming it as his own. The High Evolutionary is rewriting the human genome in a bid to turn humankind into a eugenic slave-race. Everybody wants to rule the world - and only the isolated Avengers can stop them.

The Avengers journey into deep space, where they unite the intergalactic races against the Builders - deadly aliens who seek to destroy the known galaxy. While the heroes are gone, Thanos sets his sights on Earth, sending the Black Order to launch the assault. It falls to the other heroes of Earth - the Inhumans, the Black Panther, Namor the Sub-Mariner, Doctor Strange, the X-Men, and more - to defend Attilan, Wakanda, Atlantis, and the rest of the planet. To defeat Thanos, the defending forces will need to deploy a new weapon - one that may be as deadly as the invading force. 

A vicious serial killer named Cletus Kasady has had his body chemistry altered by an alien creature. Now, Kasady can transform into Carnage, who, along with his lethal living costume, lives for chaos and random acts of senseless, brutal murder! Carnage has been returned to New York in chains, the subject of a daring attempt to reverse the effects of his metamorphosis. When the interference of a deranged scientist causes the experiment to go horribly wrong, Carnage is set loose upon the city once again!

The alien shapeshifters called the Chitauri were defeated by the Ultimates in a decisive battle, but suspicious activity leads the Ultimates to believe that not all of the aliens were destroyed in that cataclysmic attack. Stark Industries has developed means of quickly and easily detecting Chitauri DNA, but the federal government refuses to adopt the technology, claiming that if the tech is widely available, the Chitauri will find a way to fool it. Frustrated by the government’s seeming unwillingness to protect its own people, Captain America takes matters into his own hands.

Wolverine. Sabretooth. Silver Fox. Wraith. Maverick. Together, they were Team X, the best covert-ops team NATO had to offer. But a mission to retrieve a disk from a pair of Soviet agents proved to be more trouble than they bargained for. A Soviet operative codenamed the Black Widow, a mutant Interpol Officer named Sean Cassidy, and shape-changing freelance spy Mystique were also all after the disk. 

No evildoers have tried to flatten Peter Parker in weeks. His marriage to Mary Jane is stronger than ever, and he's enjoying his job as a high-school science teacher. Life is good. Naturally, that doesn't last. When Peter learns that his old enemy, the Rhino, is on a rampage in Times Square, he suits up as Spider-Man to stop the destructive villain in his tracks. But he's unexpectedly foiled in his attempts by the Black Cat, a former ally and old flame. The Cat informs Peter that the Rhino is just a distraction - the real threat comes from a group of Ancients.