Given that Robert Downey Jr's Tony Stark had an incredible exit from the MCU in Avengers: Endgame, many were puzzled when it was revealed that he'd also be appearing in Black Widow. Among those raising an eyebrow was Downey Jr himself, who recently hinted in an interview that he'd found out he was in the movie at about the same time everyone else, grumbling about the use of deepfake technology and saying: