When we heard Avengers: Endgame would be the culmination of the expansive MCU thus far… it seemed like an almost impossible task. How were they going to pull it off? There were so many storylines and characters in play, and 21 movies before it. But the filmmakers managed to wrap up the Infinity Saga and give Captain America a fairytale ending with Peggy Carter, thanks to the film’s introduction to time travel. But there is a theory revolving around the internet regarding that twist, and Cap's possible attendance of her funeral.