Captain America 4: Brave New World SDCC Trailer: Did It Release Online? Description Revealed

Following Captain America 4: Brave New World’s trailer, Marvel showcased new footage from the film to the Hall H audience at San Diego Comic-Con (SDCC) 2024. But was the clip released online? What happened in it? Did it finally confirm Adamantium and Giancarlo Esposito’s villain, Sidewinder?

Dive into our breakdown of the Captain America: Brave New World SDCC 2024 trailer to get the answers you seek.

The Captain America: Brave New World footage unveiled at San Diego Comic-Con was exclusive to the event. It wasn’t released online for the public and was specially edited for the viewers in Hall H. While we can’t officially watch the new footage until Marvel officially releases the trailer online, the description of what happened in the SDCC trailer is available.

What happened in Captain America: Brave New World’s SDCC trailer?

The new SDCC 2024 trailer of Captain America 4: Brave New World reveals significant plot points and character dynamics ahead of its February 14, 2025 release. It opens with President Thaddeus “Thunderbolt” Ross (Harrison Ford) addressing a “historic evening” at the White House. Ross discusses a celestial mass that emerged from the Indian Ocean, referencing the fallen Celestial from The Eternals.

He explains how nations scrambled to claim Adamantium, a newly discovered element, emphasizing its importance for all humanity. This hints at Adamantium’s future significance in the MCU, particularly its connections to Wolverine and Captain America’s shield in the comics.

The trailer then transitions to a conversation between Ross and Sam Wilson, the new Captain America (Anthony Mackie). Ross acknowledges their past disagreements but praises Sam’s recent accomplishments, proposing that Sam help rebuild the Avengers, highlighting the need for unity and leadership. This sets up potential conflicts and collaborations between Ross and Wilson.

A dramatic sequence follows where Sam receives a new Captain America suit, leading into a sizzle reel of action scenes. Notably, Giancarlo Esposito’s character, Sidewinder, appears, declaring, “standby for proof of death” before engaging in combat with Sam. The tension escalates as Sam confronts Ross in a boardroom, accusing him of compromising his inner circle, with Ross insisting on resolving the issue.

Additional scenes from the Captain America 4 SDCC trailer show Sam flying through a chaotic landscape with rockets chasing him around the fallen Celestial, Tiamut. The footage also features Sam walking alongside Joaquin Torres in his full green Falcon suit.

The trailer concludes with President Ross transforming into the Red Hulk and roaring from a podium in front of the White House.