Stan Lee managed to film his customary cameo for Avengers: Endgame before he died in November last year.
But sadly, the Marvel Comics icon did not get to see the finished movie.
Marvel Cinematic Universe boss Kevin Feige confirmed that Lee didn't witness the final chapter for the Avengers in a wide-ranging Ask Me Anything session on Reddit, in which he answered questions from fans.
And it was because Stan wanted to stick to tradition.
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“Stan loved to wait to see the final movie at the premiere, so unfortunately he did not get to see the finished movie,” Feige said.
“Stan got a download of the full story the day he came and shot his cameo.”
The brief role saw a younger-looking firebrand Lee with a moustache and dark hair, giving his two cents to the US military as he drives past the army base in New Jersey, where Captain America and Tony Stark have gone back to the 70s as part of the film's 'time heist' plot.
“Hey man,” he shouts, “make love not war!”
Feige, who has masterminded to 22 movies so far in the Marvel series, also spoke briefly about the plans for the spin-off series which will land on Disney's new streaming service, Disney+.
Shows centring on Vision and Scarlett Witch, Loki and Hawkeye are all in the pipeline.
Asked how the shows will 'weave into' the Marvel movies, Feige replied: “Totally and completely.”
It's also thought that supervillain The Mandarin could be set to 'return' to the MCU, after his appearance in Iron Man 3.
Ben Kingsley famously played him in the movie, however, it is later revealed that he's in fact an actor called Trevor Slattery, intended as misdirection from the film's true villain, Guy Pearce's Aldritch Killian.
But in the Marvel short All Hail The King, from 2014, it's confirmed that the 'real' Mandarin is out there somewhere.
Asked 'are there any plans to incorporate the Ten Rings from the first Iron Man, or the 'real' Mandarin teased in All Hail the King in the future?', Feige replied emphatically: “Yes.”
It's thought that the Mandarin could potentially turn up in the planned Shang-Chi movie.
You can check out the full AMA session here.