导演表示原无此台词桥段，是日后剪接师 Jeff Ford 觉得依照 Iron Man 的个性，总要回嘴 Thanos 那具「I am inevitable.」吧？因此 Jeff Ford 就建议让 Robert Downey Jr. 进行补拍并说出「I am Iron Man.」这句台词，而导演们都十分赞同这建议！
Anthony Russo: Originally when he snapped, he didn’t say, ‘I am Iron Man.’ The idea came up while we were in post production. Our editor, Jeff Ford…
Joe Russo: We were sitting on our editorial, and we were reworking that sequence, and Thanos says ‘I am inevitable.’ And we were like, ‘We need a response to that. What is the response to that?’ And our editor said, ‘What about I am Iron Man?’ And we were like, ‘That’s it!’
Anthony: We must shoot that, we have to shoot that!
不过，或许是情绪难以重现的顾虑，当时 Robert Downey Jr. 并不愿意进行补拍一事，庆幸地是在电影制片更是 Robert 长年好友的 Joel Silver 的说服下，Robert 最后仍然点头并完成了在 MCU 中意义性可谓重大的画面。
Joel Silver：Robert, what are you talking about? That’s the greatest line I’ve ever heard! You gotta say this line! You have to do this!
有兴趣的读者不妨留意 HYPEBEAST 的追踪报导，亦可关注 Disney 宣布《Avatar 2》最新续集电影将延期至 2021 年的最新情报。