Earth's heroes allied with United States President, Lex Luthor and the New Gods of Apokolips battle against these two menaces, some giving the ultimate sacrifice.

Both menaces are defeated, but for how long and at what long-term cost?

Dead or Missing

Aquaman (displaced into the past)

Jonathan and Martha Kent (Displaced and found)

Major Sam Lane

Maxima

Strange Visitor

Warrior (Resurrected)

Hippolyta/Wonder Woman III

Destruction

Atlantis (displaced into the past)

Pluto

Topeka, Kansas

Introduction

Imperiex

Note: This series was originally a sub-plot created by writer Jeph Loeb in Superman, which spilled over into the wider DC Universe.

Action Comics #780-781 (June - July, 2001)

Adventures of Superman #593-594 (June - July, 2001)

Batman: Our Worlds at War #1 (June, 2001)

Green Lantern: Our Worlds at War #1 (June, 2001)

JLA: Our Worlds at War #1 (July, 2001)

JSA: Our Worlds at War #1 (July, 2001)

Nightwing: Our Worlds at War #1 (July, 2001)

Superboy #89-90 (June - July, 2001)

Supergirl #59-60 (June - July, 2001)

Superman Vol. 2 #171-172 (June - July, 2001)

Superman: Our Worlds at War Secret Files #1 (June, 2001)

Superman: The Man of Steel #155-116 (June - July, 2001)

Wonder Woman #172 (July, 2001)

Young Justice #35 (July, 2001)

Young Justice: Our Worlds at War #1 (June, 2001)