This article contains plot details about Avengers: Endgame! While Disney showed it to the press, some may nevertheless find the following details spoilerish.
Disney showed two scenes from Avengers: Endgame at CinemaCon on Wednesday, footage which revealed the status of the Infinity Stones and explains — to a degree — why Captain Marvel has been a no-show until now.
The first scene is set in Avengers headquarters and it’s the same scene from the trailer where Thor faces off with Captain Marvel. The footage opens mid-scene with Carol Danvers about to walk out on Cap, Banner, Natasha, Thor, Rhodey, Rocket and Nebula. No sign of Tony Stark or Scott Lang here. When asked where she’s going, Carol says matter-of-factly, “To kill Thanos.”
Source: IGN.com New Endgame Scenes Reveal Latest on Infinity Stones and Why Carol's Been a No-Show