Check it out! There is a brand new trailer out now for the TMNT film to be released August 8th. This new trailer includes a great look at all four Turtles, Splinter, and Shredder. The Shredder's armor looks very "robotic/exoskeletal" in this film, but there is a tidbit about how "the new armor", so I think what we see in the action sequence is more of an upgrade, rather than the initial look...something saved for the end of the film.
Regardless, the overall action in this trailer leads one to believe that this is going to "try" to be kid friendly, but aimed at nostalgic adults.