The portals scene was reworked in post-production (along with, famously, Robert Downey Jr'.s 'I Am Iron Man' one-liner) and the rest is history – even if Endgame writer Stephen McFeely freely admitted, "I thought the first cut worked pretty well."

There was probably some debate regarding the most famous moment, I think, of all the Marvel films, which is the portals opening at the end of Avengers: Endgame. The original concept was that the camera rotated around Steve Rogers and everybody was collected behind him.

From Black Widow’s sacrifice on Vormir to Tony Stark’s heartfelt "I love you 3000" phrase and Steve Rogers' emotional ending, every scene packed an emotional punch. But perhaps none were as iconic as the return of the Infinity War casualties.