What If? #18 was published by Marvel Comics on December 1, 1979, as part of a series that began in 1977. Peter B. Gillis writes, and art comes from Bob Wiacek, Bruce Patterson and Glynis Oliver Wein. This 52-page issue features Spider-Man, Doctor Strange, Doctor Doom, Watcher and Wong, among 17 characters catalogued on VerseDB.