When the powers of a single hero are not enough to save the world, the world’s greatest heroes—Iron Man, Thor, Captain America, The Hulk, Ant-Man/Giant Man and Wasp—assemble to form the Avengers.

The Turtles — Leo, Raph, Donnie and Mikey — each will go it alone for the first time. Faced with new threats and teaming up with old allies, the Turtles will discover who they really are when ...