There's a Toy Fair 2013 Teenage Mutant Ninja Turtles toy slideshow on youtube with sneak peeks at lots more upcoming stuff.TMNT Toys Toy Fair Sneak Preview 2013
At least one figure might be considered a slight spoiler, so heads up.
Check out the screen grabs! There's a new Shredder with removable helmet, kid versions of the turtles mirroring the 4kids toddler concept, a new set of stealth gear turtles, new bad guys, a kraang vehicle, and a bad guy pop-up playset! There's even more in the video, too, including a new splinter in kendo armor, some kind of non-articulated turtle figurines and then some.