On Saturday in Brazil at Comic Con Experience, Marvel Studios President Kevin Feige showed off the first footage ever, but of course it was only for an intimate, select group of thousands who were assembled in the convention room. When it arrives next year, Eternals will be the first film to debut for Marvel as a part of the MCU's .
The best description of the footage comes from piecing together various Twitter reactions and The Wrap's reaction here. According to that article, the room got a glimpse at some of our big heroes, including Gemma Chan as Sersi, Angelina Jolie as Thena, Salma Hayek as Ajax (on horseback), and Kumail Nanjiani as Kingo.
Eternals also stars Richard Madden as Ikaris, Kit Harington as Dane Whitman, Barry Keoghan as Druig, Lauren Ridloff as Makkari, Brian Tyree Henry as Phastos, Lia McHugh as Sprite, and Don Lee as Gilgamesh. It's directed by Chloe Zhao and is scheduled to be released Nov. 6, 2020, as the second film of MCU's Phase 4.