In addition, the upcoming Infinity War was also a major comic book story.
While we have no idea where the plot of the MCU will be going following Infinity War, it would appear, based on Joe Quesada’s comments to Comic Book Resource, that the plan is to continue to look to the comics for inspiration.
Aside from simply being the birthplace of all the major characters, major comic book events, like Age of Ultron and Civil War were adapted for the screen from the comics.
The comics have certainly been the perfect fodder for the Marvel Cinematic Universe up to this point.