Iron Man and Captain America: Heroes United (2014)

In a playful dispute over problem-solving, Tony Stark and Steve Rogers face a serious challenge when Taskmaster, sent by the Red Skull, seizes Stark's tech and kidnaps Rogers. The Red Skull uses Rogers as a key for global domination. Stark must find his friend, and together, they confront the Red Skull, navigating threats and divergent approaches to save the world from peril. The fate of the world hangs as they strive to outsmart both the villain and each other in a complex battle of wits.