Crossover Earth

Crossover Earth is the name given to the reality where DC and Marvel characters co-existed and had adventures together.

History

The Official Crisis on Infinite Earths Index (March 1986) and its sequel The Official Crisis on Infinite Earths Crossover Index (July 1986), officially approved though not published by DC Comics, called the reality where the DC and Marvel Comics characters co-existed Crossover Earth. Marvel would later assign the reality the name "Earth-7642" in their Official Handbook of the Marvel Universe.
Crossover Earth is one of the three Earths in the Crossover Index that does not appear in Crisis on Infinite Earths: The Compendium.
This reality is notable for having its own Phoenix Force and Darkseid.
At the time of the two Official Indexes (1986), only four DC/Marvel stories were expressly labeled as being set on Crossover Earth:
The online companion to The All-New Official Handbook of the Marvel Universe (2006) added the following DC/Marvel stories to the Official Indexes list:
The online companion to The All-New Official Handbook of the Marvel Universe (2006) also added other Marvel crossovers, expanding the number of characters that existed on this Earth. Among them were various characters from the Wildstorm Universe (such as the WildC.A.T.s and Gen 13).
Not all stories where Marvel and DC characters co-exist in the same reality happen on Crossover Earth.^[2] Batman/Captain America, for example, is not set on Crossover Earth, but rather on Earth-3839.

It is unclear how much of Crossover Earth's history is similar to New Earth on DC's side of things.
- Likewise, while parts of it may largely resemble New Earth, some elements of Earth-One may still be canon due to several crossover stories being written and released before Crisis on Infinite Earths was even published.