WARNING: This article contains spoilers for Eternals.
The post-credits scene in Eternals retcons what was previously known about Thanos’ past in the MCU. One of the movie’s most surprising moments occurred after the credits when two Marvel Comics characters – Starfox and Pip the Troll – came aboard the Domo and confirmed that the former has an important link to Thanos. Apparently, Starfox is Thanos’ brother.
Played by Harry Styles and dressed in a comic accurate red-and-white costume, Starfox
Read more on screenrant.com