Bit odd though since Avatar, not Titanic, is the leader so he'll have to do this again if Endgame overtakes Avatar.
Also it shows how successful James Cameron is that until now the only film to beat Titanic was his own film Avatar, he had the two biggest grossing films of all time (well, ignoring inflation).
When Titanic surpassed Star Wars:
https://www.themarysue.com/wp-conten...ameron-ad2.jpg