Brie Larson's Captain Marvel was introduced on big screen in 2019 to the Marvel Cinematic Universe, but she could have been introduced to the big screen back in 2015's Avengers: Age of Ultron, courtesy of the colossal Infinity Saga box set. The scene of the new Avengers assembling at their headquarters with Scarlet, Falcon, Vision and Warmachine revealed that that scene was shot with a stand-in uncast Captain Marvel. Check out the photo below.
Captain Marvel was originally going to appear in Avengers Age of Ultron. From the Infinity Saga Box Set. from r/marvelstudios
Marvel Studios Head Kevin Feige explained in an interview in 2015. “The way we reveal Scarlet Witch [in costume] at the end of the movie? Those were Captain Marvel plate shots. Joss said, ‘We’ll cast her later!’ And I said, ‘Yeah Joss, we’ll cast her later.’ [Whispers to an invisible associate who isn’t Joss] ‘We’re not putting her in there!’ Finally Joss was like ‘Let’s use those plates to let Scarlet Witch fly into frame, give her a big entrance?’ And that makes sense – she’s come to their side, and she deserves the cool intro, which will feed into another movie we start shooting in a few weeks.”
Captain Marvel stand-in was removed digitally. The studio created animation for her flight at Avengers compound and they repurposed those animations for the big entrace of Scarlet Witch. Feige also added, “There were drafts that maybe people somehow got their hands on and read early on that included some characters – maybe others, but certainly one, which is why it’s dangerous to read scripts early on, and talk about them early on. [Captain Marvel] was in a draft. But to me, it would have done that character a disservice, to meet her fully formed, in a costume and part of the Avengers already when 99% of the audience would go, ‘Who is that?’ It’s just not the way we’ve done it before. Thanos is the good ‘Who’s that,’ because he’s clearly a bad guy, for comic fans he represents a specific storyline, you can get the buzz started from fans to non-fans with that cameo – as opposed to a title character, who deserves their own story. Even Black Widow you don’t meet in the last two seconds of Iron Man 2 wearing her costume – you evolve that going forward.”
Do you think Captain Marvel should have appeared in Avengers: Age of Ultron?