Warning: The following article contains spoilers for “Eternals.”

The mid-credits scene of “Eternals” features a surprising debut for a Marvel comics character that may reshape the Marvel Cinematic Universe.

What happens at the end of ‘Eternals’?

“Eternals” ends with a rather stark cliffhanger as Sersi (Gemma Chan) is summoned by Arishem the Judge. She is captured in front of Dane Whitman (Kit Harrington).

Soon, Sersi appears before Arishem the Judge with other Eternals, including Kingo (Kumail Nanjiani), Sprite (Lia McHugh) and Phastos (Brian Tyree Henry). Arishem takes them away for judgement.

What happens in the mid-credits scene?

Thena (Angelina Jolie), Makkari (Lauren Ridloff), and Druig (Barry Keoghan) are still kicking around, having not been taken away by Arishem.

Then, the three survivors note something is coming to them. We then see Pip the Troll (voiced by Patton Oswalt) appear out of thin air. Pip tells them that they’re going to witness the grand arrival of Starfox, also known as Eros, the brother of Thanos.

There’s a new ‘Eternals’ trailer, and it reveals something shocking about Thanos
‘Loki’ director explains how Kang is different than Thanos
Here’s how Marvel will handle the COVID-19 pandemic

Eros, played by Harry Styles, informs the Eternals he knows where their friends are and he wants to help them.

Who is Eros?

Eros is a bit of a controversial figure in the Marvel Cinematic Universe. The simple story is that he is an Eternal who has often to be associated with Thanos. He rose up to fight against Thanos during the early stories of his character. Once his brother is defeated, he heads to Earth to become an Avenger.

But Eros has been associated with controversy throughout his run. In fact, he was once put on trial for allegedly using his powers to coerce women into having sexual relationships with him. And Jennifer Walters (the real name of She-Hulk) ends up being the lawyer against him. But then Jennifer has a relationship with Eros, and she can’t decide if it was something Eros forced her into her not. All that to say, it’s all very controversial and might not fit well into the family-friend Marvel Cinematic Universe.

But, according to Gizmodo, the MCU version of Eros might serve as a way for the universe to confront Thanos. Since Thanos is gone, Eros might be his proxy. People might try to hurt Eros for his ties to Thanos.

Either way, we’re in store for a major shakeup in the MCU. And Eros appears to be at the head of it.