As Ultron's onslaught continues across the planet, superheroes race to stop his plans, from Captain Marvel teaming with Captain Britain in a fight to save London, to the Fantastic Four battling an android army in space.

Contains material originally published in magazine form as Avengers Assemble #14AU-15AU, Fantastic Four #5AU, Fearless Defenders #4AU, Superior Spider-Man #6AU, Ultron #1AU, Uncanny Avengers #8AU, Wolverine & the X-Men #27AU and Age of Ultron #10AI.

Avengers assemble #14AU & #15AU / writer, Al Ewing ; penciler, Butch Guice -- Fantastic Four #5AU / writer, Matt Fraction ; artist, André Araújo -- Superior Spider-Man #6AU / writer, Christos Gage ; artist, Dexter Soy -- Ultron #1AU / writer, Kathryn Immonen ; artist, Amilcar Pinna -- Wolverine & the X-Men #27AU / writer, Matt Kindt ; penciler, Paco Medina -- Uncanny Avengers #8AU / writers, Rick Remender & Gerry Duggan ; artist, Adam Kubert -- Fearless Defenders #4AU / writer, Cullen Bunn ; penciler, Phil Jimenez -- Age of Ultron #10AI / writer, Mark Waid ; artist, André Araújo.