It also set the tone for who could lead the Marvel Cinematic Universe heroes left to fight Thanos in next year's sequel. (Could it be a joint leadership effort between the two captains, Captain America and Captain Marvel? That could work, especially if Steve Rogers and Iron Man still aren't getting along.)
Captain Marvel, one of Marvel Comics' top heroines and the first to get her own movie franchise, also happens to be one of the most powerful beings in the MCU.
If you're not up to date on her comic-book adventures, she's a deep-space hero with cosmic/alien powers - exactly the type of hero the Avengers need right now.
Captain Marvel, starring Brie Larson in the titular role, will be in theaters in March 2019, two months before Part 2 of Infinity War debuts. The movie, which takes place in the 1990s, is an origin tale and will show how Carol Danvers becomes the hero that eventually receives the ultimate emergency call from Fury.
Captain Marvel is one of the few heroes strong enough to be an individual threat to Thanos, but she'll likely have the aid of the few Avengers who remained at Infinity War's end. She's also a likely candidate to lead the next generation of Avengers if Marvel Studios decides to make more of the films with a new core cast.
Despite the fact that the rumors of her appearance in Infinity War were wrong and all we saw was her superhero logo, the audience excitement around that small visual, plus her upcoming theatrical debut, confirm that Captain Marvel will play an important role in the next Avengers sequel.
That's one heck of a debut for the MCU's first-ever female lead.
