Spoilers ahead for Avengers: Endgame. We have yet to reach the endgame of picking over Avengers: Endgame, so as directors Joe and Anthony Russo do the post-release rounds and dig into the nitty gritty, CinemaBlend asked how they came to Tony Stark’s memorable final line, “I am Iron Man” in response to Thanos saying, “I am inevitable.” While they tried out a few different responses, it wasn’t until a suggestion from their editor Jeff Ford came up in post-production that they landed on the line: Anthony Russo: Originally when he snapped, he didn’t say, ‘I …