The debut trailer for Captain America: Brave New World offers a glimpse of 'Tiamut Island' 'and fans are relieved that the MCU finally seems to be addressing this previously abandoned plot point from Eternals.

The new footage sets up the story of the fourth Captain America film with plenty of action and exciting teases, including a first look at Red Hulk. One shot that got people talking was Anthony Mackie's Sam Wilson soaring past a rocky monument fans have identified it as the site of Tiamut, the deceased Celestial from Eternals.

Eagle-eyed viewers who spotted the reference immediately took to social media to share their relief that the MCU has finally acknowledged the events of Eternals, specifically Sersi using her powers to turn Tiamut into stone in a bid to prevent the Celestial from completing the Emergence and destroying Earth.

His colossal remains left protruding from the ocean have often raised questions among fans since all of the Phase 4 projects post-Eternals failed to pick up on that plot point (bar an Easter egg in She-Hulk: Attorney at Law), but the Tiamut sneak peek in Captain America: Brave New World has put minds to rest.

First sneak peek at Tiamut Island in ‘CAPTAIN AMERICA: BRAVE NEW WORLD’ 👀 pic.twitter.com/o93O3Fq24V

— Cosmic Marvel (@cosmic_marvel) July 12, 2024

we are finally getting an acknowledgement of the eternals movie leaving tiamut in the middle of the ocean pic.twitter.com/lB2bC9jslv

— #JusticeforKelnacca (@TheIndgNerd) July 12, 2024

Tiamut Island can be seen in the Captain America Brave New World Trailer.

Not only will we finally get answers about the island but this story will continue into Thunderbolts.

Get Ready for Governments of the world fighting over the resources found in the Giant Celestial! pic.twitter.com/826dTBwZX5

— VaiN Sensei (@SenseiFaneto) July 12, 2024

WELCOME BACK TIAMUT #Eternals

Goodbye “why haven’t we addressed Tiamut in the MCU?” Tweets pic.twitter.com/Z1joU0cNRS

— Nat✨ (@nattheawknerd) July 12, 2024

Tiamut has returned which means Marvel didn’t forget about the events of Eternals, the Celestials, or the Eternals. People will revisit the film and it will finally get its flowers yessss

pic.twitter.com/3b1RECUN8n

— Nat✨ (@nattheawknerd) July 12, 2024

Me knowing I’ll never have to see people with absolutely no patience complain about Tiamut ever again. #BraveNewWorld pic.twitter.com/c8lE4h0Qp8

— bailey (@devdweight) July 12, 2024

Eternals/Tiamut island finally being acknowledged in Brave New World... i used to pray for times like this

— sandro 🚀 (@OLSENSCTRL) July 12, 2024

I’m going to be insufferable when I see Tiamut on the big screen again and I WILL NOT be sorry about it. I used to pray for times like this

— Nat✨ (@nattheawknerd) July 12, 2024

After what will be over 4 years, 8 Movies, 7 TV shows & a special presentation, Tiamut's lifeless corpse is finally returning to the MCU!#CaptainAmericaBraveNewWorld 💥🫡 pic.twitter.com/E5SKYwZmph

— TomMCJL 💥⚒️ (@TomMCJL) July 12, 2024

A long-running rumor suggests Tiamut may hold valuable resources that global leaders want to claim. One of the rare materials could be adamantium, which Marvel describes as "an artificial metal alloy that is indestructible and capable of cutting through almost any substance." It also makes up Wolverine's skeleton.

The synopsis for Captain America: Brave New World teases "a nefarious global plot" as Anthony Mackie's Sam Wilson meets with the newly elected U.S. President Thaddeus Ross, played by Harrison Ford, amid an international incident, which he must tackle before "the true mastermind has the entire world seeing red."

We're only likely to find out more when Captain America: Brave New World opens in theaters on February 14, 2025. The film is part of Phase 5 of the MCU before Thunderbolts* caps things off.

Adele Ankers-Range is a freelance entertainment writer for IGN. You can follow her on X/Twitter here.