Crisis on Infinite Earths Giant

Crisis on Infinite Earths Giant is the tie-in comic. It was released digitally in two chapters on December 15, 2019, and January 19, 2020.

Trivia

 * The issue announced that another tie-in comic will be made to explain inconsistencies with and.
 * The issue was written midway through writing the scripts of the crossover. This results in the inconsistency of the issue and the crossover.
 * The issue includes a page explaining the continuity of the issue.
 * The issue's two parts takes place between the scene when Harbinger travels to Earth-74 to recruit the universe's Waverider and the Monitor explains the Paragons to the heroes in.
 * As Earth-X was seen destroyed in the opening of, Marc Guggenheim explains that the scene takes place between and.
 * Part of the continuity errors are solved in the second issue of the series.