Cowabunga! The brand new, full-length trailer for Teenage Mutant Ninja Turtles is now online, and can be seen on Collider. The preview should give fans plenty to talk about, including the best look at Shredder yet. In addition, the site also has four new character posters for the film (including one in which Michelangelo appears to be 25-feet tall). Starring Megan Fox as April O’Neil, the live-action/animated movie comes to theaters everywhere on August 8th.