The MCU has done a great job of bringing the world of Marvel Comics to life on the big screen. The franchise is currently one of the highest-grossing movie series in history, and it shows no sign of slowing in the near future, with two more Avengers movies slated to be released in the next couple of years. Part of the reason for this success comes from how well the MCU has adapted the likes of Iron Man and Captain America to the big screen.