Comment Wrong. (Score 5, Informative) 13
These figures are never indexed to inflation, because that would take away from the hype value.
Avengers Endgame has taken in 2.925 billion worldwide.
However, Gone With the Wind, released in 1939, took in 43.4 billion, if you index the ticket prices to inflation. The average price for an adult movie ticket in 1939 was 25 cents, which is equivalent to $6 today.
So Gone With the Wind is still the all-time champion.
Avengers Endgame is actually number 2.