With just over two months to go before Paramount Pictures' Teenage Mutant Ninja Turtles hits the big screen, toy-centric blog Idle Hands has posted images from this month's book, "Teenage Mutant Ninja Turtles: The Ultimate Visual History," which, as part of its celebration of the many iterations of the franchise, showcases concept art for the new big screen versions of Shredder and Master Splinter. Check them out below and click on the images for even more over at Idle Hands!

In the August 8 release, starring Megan Fox, Alan Ritchson, Jeremy Howard, Pete Ploszek, Noel Fisher, Will Arnett, Danny Woodburn, Johnny Knoxville, Tony Shalhoub and William Fichtner, 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 (Fox) and her wise-cracking cameraman Vern Fenwick (Arnett) to save the city and unravel Shredder's diabolical plan.