Foreshadowing Wakanda
In the ending scene of Iron Man 2, Nick Fury sort of gives his approval for Tony Stark’s Avengers Initiative. In this scene, we can see a map in the background that highlights several crucial locations in the Marvel universe.
There’s a mark for Greenland where Captain America was kept frozen, Sokovia where the Maximoff twins were born, and the Midwest that indicates the Hulk’s hiding spot. One other circle that astute viewers noticed was in Africa, most likely indicating Wakanda. The Black Panther had yet to be mentioned in the MCU, so people took this as a prediction of Black Panther’s future arrival.