4) Passing The Shield – Captain America: The First Avenger/The Winter Soldier
In our third moment of foreshadowing from The Winter Soldier (it’s fitting that it should have so many, as the film revolves around an algorithm that predicts the future), we have this scene which you could easily have missed.
When fighting his former friend Steve, Bucky wields Cap’s shield. This is an allusion to the fact that in the comics, after he remembers who he is and reforms, he eventually takes on Steve’s mantle and becomes Captain America. The same thing happens in The First Avenger, also referencing this turn of events.
While this could just be a fun easter egg, the fact that Chris Evans has spoken of his wish to retire from acting in the future and Sebastian Stan having a bunch of Marvel films left on his contract suggests that these moments are actually a canny bit of foreshadowing…