The character of Captain Marvel was originally created by Fawcett Comics in the 1940s as a rival to Superman. A successful lawsuit by Superman's owner, DC Comics, resulted in the character disappearing for more than a quarter-century. DC, which had acquired the rights to the character, relaunched him in the comics in 1973. However, during Captain Marvel's long hiatus, DC rival Marvel Comics launched its own, unrelated Captain Marvel character, which prevented DC and the producers of this series from using Captain Marvel as a title. As a result, the title "Shazam!" was introduced. As of 2007, Shazam! is still used on all DC publications featuring the original Captain Marvel. Captain Marvel was actually created in 1939. In mid 1939, an ashcan copy of a comic printed under both the names "Flash Comics #1" and "Thrill Comics #1" was printed purely to secure copyrights for the character, but the names used were already in use elsewhere. The name of the main character was changed to "Captain Marvel," and the title of the magazine changed to "Whiz Comics." Whiz Comics #2, reprinting the stories from the earlier ashcan copy, was printed for distribution in late '39, and dated February 1940. A copy of the ashcan edition was discovered in 1985, at which time it was considered to be the most valuable comic book in existence.