New 'Teenage Mutant Ninja Turtles'trailer offers another peek at Krang.

The Turtles come into conflict with T.C.R.I. scientist Dr. Baxter Stockman, theFoot Clan and the return of their enemy, The Shredder, who has hired Stockman to create mutants of his own in the form of Bebop and Rocksteady. Meanwhile, an invasion above New York City is led by the Dimension Xinhabitant known as Krang. The Turtles are joined in the fight with Splinter, and their human friends April O'Neil, Vern Fenwick and the vigilante Casey Jones.