10. "Iron Man 3" (2013)

Total gross revenue: $1,214,800,000

Tony Stark swept away comic fans with the third movie of his trilogy, "Iron Man 3." It only took 23 days in the box office for the film to hit $1 billion. If anyone doubted the power of Robert Downey Jr.'s success as Iron Man before, this movie was the final confirmation of his vital role in Marvel's franchise.