One of the best things about the Marvel Cinematic Universe is the franchise’s ability to sow small details that go on to have massive implications for the universe, whether they’re easy to notice or not. Like any film, the narrative of the MCU movies are at their best when they can pay off something that is set up much earlier. As such an expansive franchise, the MCU can afford to seed tiny elements of the plot whose ramifications are only seen multiple movies later, ending up to be much more important moments than originally thought.