Avengers: Infinity War ended in dramatic fashion, with Thanos wiping out half of the world's population. But before Nick Fury disintegrated, he sent a signal to Captain Marvel.
Things were so dire that Samuel L Jackson's character felt compelled to do this, but some people have been wondering – if Brie Larson's Captain Marvel is such a force to be reckoned with – why this is the first time she has been contacted.
After all, humanity was under threat in the first Avengers and Avengers: Age of Ultron.
Will Corona Pilgrim, who wrote Marvel's Captain Marvel Prelude #1, explained that Carol Danvers was only meant to be a "last resort" for Fury.
"Carol's the biggest gun you've got, and Fury's never one to waste a silver bullet," Will said. "So if he's finally making that call after all this time and after all he's faced alongside the Avengers, then he's truly seeing the situation as a last resort."
Captain Marvel will launch ahead of Avengers 4, and Kevin Feige has previously talked about Carol Danvers' importance in the Marvel universe.
"She is more powerful than any character we've introduced thus far," says Feige. "So that alone tells you that there's a reason Nick hit that button at the end [of Infinity War], when he realised that they were up against something far bigger than they had ever been up against before.
"And having her on your side is hopefully going to change the balance of power in a way that they desperately need."
Captain Marvel will be released on March 8, 2019, while Avengers 4 arrives in cinemas in the UK on April 26, 2019, and in the US on May 3, 2019. Avengers: Infinity War is out now on Blu-ray, DVD and digital download.
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