The European country of Slorenia is dead. Every man, woman, and child eliminated with the cold precision of a machine. And out of the flaming remnants of this tiny Baltic state comes a message from its murderer: Mankind's days are numbered because Ultron has returned! He - or it - is one of the Avengers' oldest, most implacable foes, menacing humanity countless times. But never before has Ultron been this dangerous, this deadly. Now, he stands on the brink of committing global genocide, and rebuilding Earth in his own robotic images. Our only hope is a desperate U.N. strike on Slorenia, led by the Avengers themselves. But will it be in time? Will the strength and courage of Earth's Mightiest Heroes be enough in the face of such overwhelming evil? For the sake of the world, it will have to be! Plus: When you're an Avenger, you're one of Earth's Mightiest Heroes - the first line of defense against the dangers no conventional foe could halt, the threats no ordinary man could withstand. Threats including Dominex, Lord Templar, Pagan, and the Thunderbolts! Collects Avengers #12-22, #0 and Annual 1999.

The Avengers must confront their greatest foe yet: Ultron, the sentient robot created by Avenger Hank Pym, who has seized control of the world's media and destroyed the Eastern European country of Slorenia.

AVENGER VS. AVENGER! Thanos has been defeated, but the Avengers' biggest challenge may come from within their own ranks! Captain America makes a discovery that may tear the team apart! And: Witness the origin of one of the Avengers' greatest villains! COLLECTING: MARVEL UNIVERSE AVENGERS ASSEMBLE: CIVIL WAR #1-4.

Captain America, Iron Man, Thor, and a large gathering of Avengers battle evil sorceress Morgan Le Fay in a strange medieval reality.

Collects Inhumanity #1-2, Avengers Assemble #21-23, Uncanny X-Men (2013) #15, Indestructible Hulk #17-19, New Avengers (2013) #13, Iron Man (2012) #20.INH, Inhumanity: The Awakening #1-2, Avengers AI #7, Mighty Avengers (2013) #4-5, Inhuman (2014) #1 and Inhumanity: Superior Spider-Man #1. After the fall of Attilan and the Terrigen Bomb explosion, thousands of people across the globe have transformed into Inhumans! Their new powers are dangerous and terrifying, making them targets. With Black Bolt believed dead, who can these new Inhumans turn to? As the Avengers face Karnak, who has discovered the Inhumans' secret, Medusa struggles to rule her vastly increased population, and Marvel's heroes - including the Hulk, Spider-Girl, the X-Men, the new Illuminati, Iron Man, the Jean Grey School, Avengers Academy, Luke Cage and the Superior Spider-Man - must cope with the fallout! Author: Matt Fraction, Kelly Sue Deconnick, Warren Ellis, Brian Michael Bendis, Mark Waid, Johnathan Hickman, Kieron Gillen, Matt Kindt, Sam Humphries, Al Ewing, Christos Gage. Illustrator: Matteo Buffagni, Olivier Coipel, Nick Bradshaw, Kris Anka, Clay Mann, Simone Bianchi, Joe Bennett, Paul Davidson, Andre Araujo, Greg Land, Joe Madureira, Richard Elson. © 2019 Marvel Characters, Inc. All rights reserved. All characters featured in this issue and the distinctive names and likenesses thereof, and all related indicia are trademarks of Marvel Characters, Inc. No similarity between any of the names, characters, persons, and/or institutions in this magazine with those of any living or dead person or institution is intended, and any such similarity which may exist is purely coincidental. www.marvel.com.com.

Collects Avengers Assemble #1-8. A perfect jumping-on point, featuring the cast of the summer blockbuster - but in Marvel Universe continuity! But who is behind the villianous Zodiac's return? None other than Thanos, the mad Titan, who has claimed Earth as his own! The Avengers team up with cosmic blockbusters the Guardians of the Galaxy to bring Thanos some cosmically-charged pain!

Fan-favorite creators Kurt Busiek and George Pérez usher in a new era for Earth's Mightiest Heroes! Since the team's inception, the Avengers have always defended humanity against the forces of evil. When duty calls, these legendary champions answer, fighting valiantly until justice prevails. But what happens when their oldest foes strike directly at the team? On the eve of a huge Avengers gathering, an attack by the evil enchantress Morgan Le Fay sends these assembled heroes into a strange medieval reality where nothing is as it seems. Held under Le Fay's thrall, the Avengers have lost all memory of their true identities. Breaking free of Morgan's spell, Captain America and Hawkeye must fight to free their teammates before the Marvel Universe is altered forever! Plus: The Avengers take on the Squadron Supreme! Collects Avengers (1998) #1-11.