I realize that this isn't going to provide a straight 'yes/no' answer, but I believe it could yield a correct answer nontheless, if appropriate detail is provided...
How much of the already released Marvel Cinematic Universe films contains narrative events that are faithful to previously published canon material?
Are there any films that maintain relative fidelity to a specific narrative arc, or are they all considered original storylines?
This is obviously ruling out the 'loose' details of the character emergence/origin story, more specific plot points and narrative..