10. Captain America: The Winter Soldier (2014)
Following a conspiracy inside S.H.I.E.L.D., Captain America doesn’t know who to trust, until he discovers Hydra has been constantly interfering in the organization. This is how the movie prepares fans for Avengers: Age of Ultron.
Key scenes are revealed after the credits. In one of these, Von Strucker proclaims at a Hydra laboratory that “the age of miracles” has begun. Finally, let’s not forget the final part in which Barnes visits his own memorial and the Smithsonian Institute.