As the countdown to the controversial Michael Bay-produced "Teenage Mutant Ninja Turtles" film continues, Paramount has released three character posters, with the fourth -- along with a new trailer -- expected later today. Leonardo was the first poster unlocked by a Twitter-based fan campaign, followed by Michelangelo and Raphael; Donatello's new look rounds out the quartet of one-sheets.

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Take a look at the posters now, and check back with CBR throughout the day for the new trailer.

Directed by Jonathan Liebesman, the franchise reboot stars Megan Fox, Pete Ploszek, Noel Fisher, Jeremy Howard, Alan Ritchson, Danny Woodburn, William Fichtner, Will Arnett and Whoopi Goldberg. "Teenage Mutant Ninja Turtles" is scheduled for release on Aug. 8.