One of the luxuries of Marvel putting out multiple movies each year is that they can use current movies to introduce characters for the next ones. The studio has been doing it for years, of course, and not only in post-credit scenes; it’s not much of a spoiler to say that Black Panther and the latest version of Spider-Man both make their Marvel debuts in Captain America: Civil War.

Spider-Man’s solo movie comes out in 2017 and Black Panther’s will arrive in 2018. And now the directors of Winter Soldier and Civil War dropped a clue about when fans will get their first glimpse of a superhero whose movie arrives in 2019.

At a recent Marvel-centric event at the Smithsonian Institute (via ComicBook.com), Joe and Anthony Russo let slip that plans are in place for Captain Marvel to make an appearance in Avengers: Infinity War. And while the news was met with excitement from those in the crowd, the brothers quickly tried to wrangle in the information, as the admission apparently came completely by accident. When one fan asked they confirm, the brothers cheekily replied, "Um....Captain Barvel. Totally different character." 

Several of the attendees took to Twitter under the hashtag #MarvelAtSI to discuss the Captain Marvel news, and many of them also enjoyed the directors' humorous attempts at redirecting the information leak.

Pretty sure the Russos just slipped & confirmed Captain Marvel is going to appear in #AvengersInfinityWar. #marvelatsi— Jessie DaSilva (@jdasilva) May 6, 2016

Might have just let slip that Captain Marvel will be in Infinite Wars #MARVELatSI— Buckaroo (@cygnaut) May 5, 2016

Captain BARVEL will be in the Infinity Wars. With a B. This is important to clarify, as the Russos just called upon the Snipers #MarvelAtSI— EmSieg (@emireeshigfreed) May 6, 2016

“Cap Marvel would be in Infinity Wars except she dies at end of Cap Marvel” trying to weasel out of confirming Carol in film #MarvelatSI— Karon (@karon) May 6, 2016

Captain Marvel's appearance isn't really a huge bombshell; Marvel did announce in the fall of 2014 that it was working on a solo feature for the character, which would represent the first Marvel Cinematic Universe film to star a female superhero as the sole lead. Nicole Perlman (Guardians of the Galaxy) and Meg LeFauve (Inside Out) are on board as screenwriters and while neither the actress playing the lead nor the director has yet been announced, Marvel head honcho Kevin Feige said last month that both will be chosen this summer.

How big a screwup is this by the Russos? Not that large of one. Captain America: Civil War features 12 different superhero characters, and the first Infinity War, being a full-on Avengers movie, is likely to feature that many if not more, so an appearance by the hero of a movie arriving the following year would only be logical. Chances are, if the Russos hadn’t let this slip, the information would have come out soon eventually. Now Marvel can get to work on the Captain Marvel hype machine.

Captain America: Civil War opens in theaters May 6, 2016, followed by Doctor Strange on November 4, 2016;Guardians of the Galaxy Vol. 2 – May 5, 2017; Spider-Man: Homecoming – July 7, 2017;Thor: Ragnarok – November 3, 2017; Black Panther – February 16, 2018; Avengers: Infinity War Part 1 – May 4, 2018; Ant-Man and the Wasp – July 6, 2018; Captain Marvel – March 8, 2019; Avengers: Infinity War Part 2 – May 3, 2019; and as-yet untitled Marvel movies on July 12, 2019, and on May 1, July 10, and November 6 in 2020.

Source: TwitterComicBook.com