Teenage Mutant Ninja Turtles is about to release new character posters and a brand new trailer, but they need your help to do so.  Now I could sit here and explain how your hashtagged Tweets can unlock the character-specific posters, after which the new trailer will be revealed, but wouldn't you rather listen to star Megan Fox tell you how it all works?  I thought so.  You can find a video demonstrating just that after the jump.

Also starring Will Arnett, William Fichtner, Alan Ritchson, Pete Ploszek, Jeremy Howard, Noel Fisher, and Danny Woodburn, with Johnny Knoxville and Tony Shalhoub voicing Leonardo and Splinter respectively, Teenage Mutant Ninja Turtles opens August 8th.

In the following video, Ms. Fox explains the process of voting for your favorite of the Teenage Mutant Ninja Turtles in order to release the new posters and trailer:

Head over to the film's website to vote for the rest of the character posters.  Here's the official synopsis for Teenage Mutant Ninja Turtles, followed by the newly released poster for Leonardo:

The city needs heroes.  Darkness has settled over New York City as Shredder and his evil Foot Clan have an iron grip on everything from the police to the politicians.  The future is grim until four unlikely outcast brothers rise from the sewers and discover their destiny as Teenage Mutant Ninja Turtles.  The Turtles must work with fearless reporter April O’Neil (Megan Fox) and her wise-cracking cameraman Vern Fenwick (Will Arnett) to save the city and unravel Shredder’s diabolical plan.  Based on the Teenage Mutant Ninja Turtles Characters Created by PETER LAIRD and KEVIN EASTMAN with a Screenplay by JOSH APPELBAUM & ANDRÉ NEMEC and EVAN DAUGHERTY, Producer MICHAEL BAY (the blockbuster Transformers franchise) and director JONATHAN LIEBESMAN (Wrath of the Titans) bring Teenage Mutant Ninja Turtles, the popular franchise that has captivated audiences of all ages for decades, into the 21st century.