The DC Universe is in an alternate Multiverse within the larger Omniverse. The prime universe was briefly combined with the Earth-616 reality to form the Amalgam Universe. Citizens native to that reality sometimes refer to their primary universe as the "Earth-One", "New Earth", or "Prime Earth" universe, depending on the changes caused by the most recent events of universal proportions that are each commonly referred to there as a "Crisis."

The Avengers met a Squadron Supreme-like group called the Justice League of America from this universe during an adventure involving the Grandmaster.

It should not be confused with Crossover Earth or some of the other Crossoververses, in which counterparts to both DC and 616 individuals coexist; with Earth-3839; or with Earth-9047, in which parodic counterparts to both DC and 616 individuals coexist, apparently in different pocket dimensions.

Key Historical Events:

• The Brothers enter into a conflict with one another, using their respective universes' Earths' super-heroes as proxies.
• The Amalgam Universe fights to preserve itself from destruction.
• The JLA and the Avengers fight to win a cosmic game between Krona and the Grandmaster.

• Justice League of America
  • Superman (Kal-El/Clark Kent)
  • Batman (Bruce Wayne)
  • Wonder Woman (Diana of Themyscira)
  • Green Lantern (Kyle Rayner)
  • Flash (Wally West)
  • Aquaman (Orin/Arthur Curry)
  • Martian Manhunter (J'onn J'onzz)
  • Plastic Man (Patrick "Eel" O'Brian)
• Krona

• The planet Earth of this universe has the following characteristics:
  

Diameter:

Equatorial 12,756.270 km

Polar 12,713.500 km

Mean 12,745.591 km

Circumference:

Equatorial: 40,075.004 km

Meridional: 40,007.849 km

Mean: 40,041.455 km

Surface area:

Land: 148,939,063.133 km² (29.2 %)

Water: 361,126,221.569 km² (70.8 %)

Volume: 1.0832×1012 km

Mass: 5.9736×1024 kg

Density:5,515 kg/m³

Equatorial surface: 9.7801 m/s²

Gravity: (0.997 32 g)

• The Infinity Gauntlet does not function in the DC Universe.
• Chaos Magic is much more powerful in the DC Universe.^[1]

New Earth

• The DC Earth is slightly larger than the Earth native to the Marvel Universe.^[1]
• The DC Earth has more cities and more urban growth, at least on the East Coast of the United States.^[1]
• Hero worship is common, with some museums being devoted to heroes.
• In contrast to the mutants that are commonly persecuted by the human populace in the Marvel Universes, many mutants (commonly referred to as metahumans) in the DC Universes are generally accepted by the public.
• On this Earth, Hercules raped Hippolyta.^[1]
• After numerous cosmic upheavals, the multiverse this Earth inhabits is currently made up of infinite universes, at least two of which - Earth 7 and Earth 8 - are noticeably similar to in the Marvel Multiverse, particularly Earths 1610/2149 and Earth-616, respectively.

• Though Spider-Man and Superman had "met" in two previous crossovers, they were part of a separate continuity. The events of JLA/Avengers are thought to be in continuity for Earth-616 and New Earth, as the Krona egg created at the end of the event was shown in a subsequent JLA adventure. Of course, characters from neither company can be shown thinking too clearly about the crossovers, as it would most likely be a copyright violation.
• Numerous figures and settings in the Marvel Multiverse have mimicked aspects seen in this otherwise separate multiverse. This includes both Hyperion and the Sentry's conspicuous resemblance to the main hero of this Earth, the solar-powered alien "Superman", as well as teams like the Squadron Supreme paralleling gatherings in this universe such as this Earth's premiere defensive force, the Justice League (a comparison drawn by Hawkeye), and entire universes such as Earth-31916 (with its own variant version of the Squadron Supreme) and Earth-4290001 (guarded by the Great Society) that mirror it.
• DC Comics, and the television series and films based on them, apparently exist in the Marvel Universe and other realities in the Multiverse.
  • In Amazing Spider-Man #306, it was revealed that Peter Parker had read Action Comics #285 in his childhood.
  • In X-Force #26, Rictor watches a television show featuring Batman and the Penguin.
  • In Superman/Fantastic Four #1, it was revealed that Franklin Richards followed, and the Thing occasionally watched, Superman: The Animated Series. In the same issue, it was shown that Franklin had toys in the likeness of Batman, Robin, and Superman along with in-universe toys of Marvel's own heroes.
  • In the Ultimate Universe, in Ultimatum #1, Spider-Man and his friends bring up wanting to see the film The Dark Knight in the theaters.
  • During the first story arc of Runaways, the characters referenced the TV series Smallville, and later explicitly compared the entrance to the original Hostel to that of the Batcave in the Adam West TV series Batman.^{[citation needed]}
  • In Thor (Vol. 6) #2, the Black Winter, a multiversal entity that destroys universes, mentions its recent destruction of a universe, and it is strongly implied it was the DC Universe. The Black Winter mentions "a sun god," "a god of emerald light," "a god of dark," "a god of the ocean," "a god of speed," and "a god of strength," which are references to Superman, Green Lantern, Batman, Aquaman, the Flash, and Wonder Woman, respectively. A scene of the Black Winter's destruction of this universe shows the red and blue blur of Superman passing what looks like the Daily Planet in Metropolis, along with the green blur of Green Lantern, the shadow of Batman, and the red and lightning blur of the Flash.
  • In Amazing Fantasy (Vol. 2) #6, Aña Corazón was dressed in the outfits of Supergirl and Wonder Woman.
  • In Green Goblin #9, one of the forms that Netshape took was a thinly disguised Batman.^[2]
  • In Exiles #45, Morph morphed into a Superman-like form with an M where the S goes.
  • In Avengers #83, there was a clever addition of someone wearing a Batman costume in a Halloween parade on page 8.
  • In Thor #207, during a parade, behind a float involving the Avengers was a float featuring people who look exactly like DC Comics' Superman and Batman.