導演表示原無此台詞橋段，是日後剪接師 Jeff Ford 覺得依照 Iron Man 的個性，總要回嘴 Thanos 那具「I am inevitable.」吧？因此 Jeff Ford 就建議讓 Robert Downey Jr. 進行補拍並說出「I am Iron Man.」這句台詞，而導演們都十分贊同這建議！
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!
不過，或許是情緒難以重現的顧慮，當時 Robert Downey Jr. 並不願意進行補拍一事，慶幸地是在電影製片更是 Robert 長年好友的 Joel Silver 的說服下，Robert 最後仍然點頭並完成了在 MCU 中意義性可謂重大的畫面。
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!
有興趣的讀者不妨留意 HYPEBEAST 的追蹤報導，亦可關注 Disney 宣佈《Avatar 2》最新續集電影將延期至 2021 年的最新情報。