Six Flags is planning on building roller-coasters based on Warner Bros.' The Dark Knight. Three theme parks in the U.S. will get the new attraction: Six Flags Great America in Illionis, Six Flags Great Adventure in New Jersey and Six Flags New England in Massachusetts. The announcement from Six Flags Great America is below:

Six Flags Great America announced today its new attraction for 2008: "The Dark Knight Coaster," an indoor dark coaster based on Warner Bros. Pictures' upcoming movie The Dark Knight featuring DC Comics' characters Batman and The Joker. The Dark Knight Coaster will cost $7.5 million and opens May 2008.

"Today's announcement represents Six Flags Great America's continued focus on delivering a well-rounded and balanced entertainment package," said Hank Salemi, Six Flags Great America's Park President. "The Dark Knight Coaster offers a unique experience that will appeal to families and teens alike."

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The Dark Knight Coaster will transform guests into citizens of Gotham City - caught in the middle of a city under siege and torn apart by The Joker.

With The Dark Knight Coaster, guests will experience the ride of their lives. Venturing through demented hallways of twists, turns and hallucinatory images, they are tormented by The Joker himself. Then as they set foot onto a distressed, vandalized train platform, they can only guess at what awaits them as they speed through six 180-degree hairpin turns, climb unseen hills, plunge into pitch darkness and dip into unforeseen danger. As they attempt to escape the terror, their only hope is that Gotham's Silent Guardian - Batman - can save them.

"The opening of The Dark Knight Coaster will be perfectly-timed to coincide with the debut of the next Batman film from director Christopher Nolan. We're very excited that fans will be able to have a first-hand experience with the sites, sounds and thrills of crime fighting in Gotham City," said Brad Globe, President, Warner Bros. Worldwide Consumer Products.

The Dark Knight Coaster will use storytelling, physical movement, video, sound and special effects to bring guests a one-of-a-kind dark ride experience. The coaster will be located in the Orleans Place section of Six Flags Great America.

About The Dark Knight Movie:

Batman (Christian Bale) raises the stakes in his war on crime in Christopher Nolan's The Dark Knight. With the help of Lieutenant Jim Gordon (Gary Oldman) and District Attorney Harvey Dent (Aaron Eckhart), Batman sets out to dismantle the remaining criminal organizations that plague the city streets. The partnership proves to be effective, but they soon find themselves prey to a reign of chaos unleashed by a rising criminal mastermind known to the terrified citizens of Gotham as The Joker (Heath Ledger). The Dark Knight releases in theaters July 18, 2008.