Leonardo, Michelangelo, Raphael and Donatello are back. This time, the Teenage Mutant Ninja Turtles are facing new threats in the form of mechanical aliens by way of antagonists Dr. Baxter Stockman, Bebop and Rocksteady. In addition to these new threats is their greatest enemy, The Shredder. However, the turtles still have the help of Vern, April, and a new vigilante named Casey Jones. Check out the first trailer above.