To say Thanos' snap from Avengers: Infinity War made an impact would be an understatement as the moment from Marvel Studios has become a pop culture phenomenon. The fact that this moment has been parodied and memed to death proves that it was an unforgettable moment and was the perfect way to end that movie, giving us a cliffhanger that nobody expected to see.
So it's actually kind of shocking to know that The Snap (or The Decimation) was considered as the opening act of Avengers: Endgame. That's right, according to writers Christopher Markus and Stephen McFeely, Marvel considered making Thanos' ultimate moment part of the opener for Endgame. This is the result of numerous drafts for these two films, which make sense since this is Marvel's biggest film to date.
How did Marvel relent and let them end Infinity War with The Snap? In McFeely's words to Empire Magazine (via ComicBookMovie):
Avengers: Endgame comes out on April 26.
Read: Fans Ask Marvel Not To Release Any More Avengers: Endgame Trailers