'Ms. Marvel' has 1 end-credits scene. Here's what it means for future Marvel shows and movies.

• Warning: There are major spoilers ahead for the "Ms. Marvel" finale.
• There's one extra scene that follows the credits, featuring Captain Marvel (Brie Larson).

Marvel Studios' latest Disney+ series "Ms. Marvel" wrapped up its six-episode first season with a major cameo and tease for what's to come.

The season one finale, which was released on the streamer on Wednesday, featured a big reveal about teen superhero Kamala Khan/Ms. Marvel's (Iman Vellani) origin and one end-credits scene featuring a familiar face from the Marvel Cinematic Universe.

In case you missed the post-credits scene or aren't sure what to make of it, we have you covered.

Before the end-credits scene, Kamala's friend Bruno Carrelli drops a huge revelation: She has a mutation in her genes

After Kamala's mom gifts her with a superhero suit and she saves the day, her dad explains the origin of her name and why her parents chose it. In Arabic, "kamal" means "perfect." In Urdu, the word can be translated to "marvel," meaning that Kamala has unknowingly had this connection to her idol, Carol Danvers/Captain Marvel, since birth.

Then Kamala's dad tells her that she's always been "our own little Ms. Marvel," therefore giving the teen her superhero title.

It seems like Kamala's origin story is neatly tied up in the finale, but then Bruno (Matt Lintz) shares some game-changing information with her.

Bruno tells Kamala that he looked at her genetic makeup again because her brother, Aamir (Saagar Shaikh), wanted to know if he too might have powers.

"I think we might've had it wrong the first time around," Bruno says. "We know why you have access to the Noor and how you can wield it, but when I compared you to the rest of your family, something still seemed off. Kamala, there's something different in your genes. Like a mutation."

At the exact moment when Bruno suggests that Kamala may be a mutant, the theme song from " X-Men: The Animated Series" plays.

But Kamala nonchalantly plays off Bruno's finding, saying: "Whatever it is, it's just gonna be another label."

The use of the "X-Men '97" theme song was also confirmed by the finale's credits. But this also isn't the first time we've heard the tune in the MCU.

"Doctor Strange in the Multiverse of Madness" also included the song when Patrick Stewart showed up as X-Men character Charles Xavier/Professor X, a member of the Illuminati on a different Earth.

This "Ms. Marvel" moment is significant because it's the MCU's first overt acknowledgment of mutants.

With this revelation about Kamala's genetics, it seems like the MCU might finally be ready to bring mutants into the mix (as a refresher, Disney acquired the rights to Marvel's X-Men, Fantastic Four, and Deadpool following the 2019 merger).

"The fact that it's Kamala — it's her. It's like her wildest dream already came true over the show [gaining powers], but then we just gave her one more bit of the dream. It's incredible. I'm overjoyed," said "Ms. Marvel" head writer Bisha K. Ali in a new interview with Marvel.com.

Brie Larson returns as Carol Danvers/Captain Marvel in the end-credits scene

The scene opens with Kamala, in her superhero costume, throwing herself on her bed. She gets up when her bangle begins glowing. Then, she's transported through her bedroom-closet door, breaking it in the process.

But it's Captain Marvel, not Kamala, who emerges from the broken door, looking at her glove-covered glowing hands and wondering what's going on.

Captain Marvel picks up a ruined poster of herself from the floor, sees the various artwork on the bedroom walls dedicated to her, and says: "Oh, no, no, no."

Panicking, she runs away and a title card appears saying "Ms. Marvel will return in 'The Marvels.'"

Larson's appearance isn't entirely surprising, considering that it's already been confirmed that Vellani's character will be part of the "Captain Marvel" sequel titled "The Marvels," in theaters on July 28, 2023.

The end-credits scene does however connect the series to the upcoming film, which will probably explain the connection between the two characters.

Specific moments from the Disney+ series "WandaVision" and the 2021 Marvel film "Shang-Chi and the Legend of the Ten Rings" are also starting to make a little more sense now.

"The Marvels" will include Monica Rambeau (Teyonah Parris), the daughter of Captain Marvel's friend Maria (Lashana Lynch), who made her debut in "WandaVision" and alluded to some rocky history with Captain Marvel.

The mid-credits scene of "WandaVision" also showed Monica meeting with a Skrull claiming to be sent by "an old friend of your mother's," presumably Nick Fury (Samuel L. Jackson).

Meanwhile, the first end-credits scene of "Shang-Chi" showed Captain Marvel inspecting the titular hero's rings with Wong (Benedict Wong) and Bruce Banner/Hulk (Mark Ruffalo).

Bruce said that the rings appeared to be over 1,000 years old, beyond the time that Shang-Chi's father Wenwu acquired them. In response, Captain Marvel said that the rings didn't look like any alien technology she's ever seen. Then, she got an emergency call and disappeared.

These aforementioned loose threads, along with the "Ms. Marvel" end-credits scene, will probably be addressed in the "Captain Marvel" sequel.

Beyond "The Marvels," it's unclear if there will be a second season of "Ms. Marvel." But Vellani told Stylecaster that she'd be interested in returning to her show after fighting alongside her idol, similar to how Tom Holland's Spider-Man was introduced in "Captain America: Civil War" and continued to appear in standalone Spidey movies.