1: Iron Man faces a new threat, testing his limits.

2: The shocking twist changes everything for Tony Stark.

3: Heroes unite in the face of a dangerous enemy.

4: Betrayal and redemption collide in Iron Man 4.

5: Tony Stark's fate hangs in the balance.

6: Fans won't believe the jaw-dropping climax.

7: The ultimate sacrifice must be made.

8: Get ready for a twist you won't see coming.

9: Iron Man 4 will leave you breathless.