DC: Earth One is a series of graphic novels published by DC Comics. Each graphic novel is set in its own universe, separate from DC's mainstream universe. The series has been compared to Marvel Comics's Ultimate Marvel universe. DC Comics has announced two titles in the Earth One series, Superman: Earth One and Batman: Earth One. DC Comics has also announced that more titles are forthcoming. The series begins with Superman: Earth One, which will be published on November 2, 2010.