After announcing their upcoming line of Hanna-Barbera comics in January, DC Comics has revealed four variant covers for two of the line's series -- "Future Quest" and "Scooby Apocalypse."

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May 18 will see the launch of "Future Quest" by Jeff Parker and Evan "Doc" Shaner, the series that DC describes as taking "teenage adventurer Jonny Quest and the classic Hanna-Barbera action heroes into a whole new dimension." Two of the four variants have been revealed, including a Jonny Quest cover by Steve Rude and Bill Sienkiewicz's take on the Space Ghost crew. The standard cover comes from series artist Shaner.

"Scooby Apocalypse," which will be written by Keith Giffen and J.M. DeMatteis with art by Howard Porter, arrives one week later on May 25. DC has revealed Neal Adams' variant cover as well as Porter's variant, two of the four variants the issue will have. Jim Lee illustrated the standard cover. The series finds the Mystery, Inc. gang together again to solve the mystery of the nanite-infection that has taken over the world.