MCU Rumor Roundup: McKenna Grace's Marvel Return, Captain Marvel's Secret Wars Role, Phase 7 Plans, More

MCU Rumor Roundup: McKenna Grace's Marvel Return, Captain Marvel's Secret Wars Role, Phase 7 Plans, More

In our latest MCU rumour roundup, we have news on the post-Avengers: Secret Wars slate and some big claims about Captain Marvel, the Guardians of the Galaxy, McKenna Grace's Marvel return, and more.

By JoshWilding - Sep 18, 2026 11:09 PM EST
Filed Under: Marvel Studios

The Multiverse Saga may be heading toward its conclusion with Avengers: Secret Wars, but Marvel Studios already appears to have big plans for what comes next. New rumours point to a surprisingly streamlined post-Secret Wars slate, potential cosmic team-ups, the return of the Guardians of the Galaxy in animated form, and a potentially major MCU role for a familiar face.

Starting with an admittedly dubious source, James Mack has dropped a series of scoops on social media. He's had a few Avengers: Doomsday claims pan out, so we'll give these the benefit of the doubt for now.

He reports that Brie Larson's Captain Marvel will have "one of the biggest leading roles" in Avengers: Secret Wars, "carrying the weight of being one of the people who remembers her past life." 

Looking beyond the Multiverse Saga, the next Phase (described here as a new "Phase 1" rather than "Phase 7") will consist of only 9 movies, one of which is set to be an Avengers event. There will be 5 solo outings and 4 team-up films. So far, the only post-Secret Wars projects announced are X-Men, Ghost Rider, and Black Panther 3

Marvel Studios is also said to be developing a "space-based team-up movie," featuring characters like Star-Lord, Nova, and Silver Surfer. Noh-Varr is also in the process of being cast.

Even with James Gunn calling the shots at DC Studios now, the Guardians of the Galaxy franchise is going nowhere. Current plans call for the team to get its own animated TV series on Disney+, joining X-Men '97 and Your Friendly Neighborhood Spider-Man.

Over to @MyTimeToShineH now, who claims that Scream 7, The Hunger Games: Sunrise on the Reaping, and Scooby-Doo: Origins star McKenna Grace is being "eyed for a huge role in the MCU." She played the young Carol Danvers in 2019's Captain Marvel, but has since become one of Hollywood's most popular young actresses.

There are any number of characters she could play in the MCU, but a role in the X-Men franchise feels like the best fit for the 20-year-old. Grace has already demonstrated that she can handle major genre projects, and her previous connection to the MCU would make an X-Men role particularly interesting.

The scooper has also learned that Sebastian Stan, who plays Bucky Barnes, was among the actors on set for Avengers: Doomsday's recent reshoots.

For now, however, it's worth stressing that none of these reports has been confirmed by Marvel Studios. Until Marvel makes these plans official, fans should treat all of this as speculation, but stay tuned for updates as we have them.

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ChrisRed
ChrisRed - 9/18/2026, 7:34 AM
McKenna Grace would be perfect for Gwen Stacy/Ghost Spider!

If she's in the X-Men movies, she could be an amazing Dazzler, she's even got the singing chops!
theFUZZ008
theFUZZ008 - 9/18/2026, 8:45 AM
@ChrisRed - This is genius.
gambgel
gambgel - 9/18/2026, 7:38 AM
I see her boyfriend more likely to join the X-Men franchise than McKenna herself.

but we'll see...
catmandom
catmandom - 9/18/2026, 7:41 AM
Looks like James Gunn needs an internship at Marvel.
MotherGooseUPus
MotherGooseUPus - 9/18/2026, 9:16 AM
@catmandom - LMAO. idk but this made me laugh wayyyy to hard. thanks for making me laugh on a Friday
Malatrova15
Malatrova15 - 9/18/2026, 7:43 AM
Due kang
FIREFIREGUNN
FIREFIREGUNN - 9/18/2026, 9:23 AM
@Malatrova15 - culd she iron lady be?

Rebute Kang
TheVisionary25
TheVisionary25 - 9/18/2026, 8:06 AM
A “space based team up movie” with Star Lord ,Nova , Silver Surfer & possibly Noh-Varr you say?.

I think we may be getting a version of The Annihilators…

User Comment Image

Also if true then I could see McKenna Grace as Kitty Pryde!!.

User Comment Image
HammerLegFoot
HammerLegFoot - 9/18/2026, 8:47 AM
Has the site gotten an update? Or is it just weird looking on mobile currently?
Bucky74
Bucky74 - 9/18/2026, 8:58 AM
He reports that Brie Larson's Captain Marvel will have "one of the biggest leading roles" in Avengers: Secret Wars, "carrying the weight of being one of the people who remembers her past life." Arr. well, if Doom asks her to smile he’s screwed.
DannyBrandy20
DannyBrandy20 - 9/18/2026, 9:11 AM
Didn't she play kid Carol in first CM movie 🤔
Wahhvacado
Wahhvacado - 9/18/2026, 9:18 AM
@DannyBrandy20 - Yes and it's stated in the article

"She played the young Carol Danvers in 2019's Captain Marvel..."
Winston19
Winston19 - 9/18/2026, 9:20 AM
So ready for these Avengers movies to be over with and they just focus on X-men. I really hope none of the Avengers or anyone from the previous phases shows up in the X-men movies. I guess Jean is the exception
MotherGooseUPus
MotherGooseUPus - 9/18/2026, 9:21 AM
i cant believe thats the same actress from the 2 new Ghostbusters movies... she looks wayyyyy different
ObserverIO
ObserverIO - 9/18/2026, 9:38 AM
@MotherGooseUPus - It'll never not be weird that babies morph into adults over time. It was only yesterday she was a kid in ghostbusters. It's like a fully grown woman just hatched outta that kid over night.
MotherGooseUPus
MotherGooseUPus - 9/18/2026, 10:29 AM
@ObserverIO - LOL. agreed. i mean... mine just turned 10months last week and i feel like she was just born 2 days ago.. its absolutely wild how fast your own grow... but i guess the same can be said for kids/teens in general
ObserverIO
ObserverIO - 9/18/2026, 10:32 AM
@MotherGooseUPus - Perhaps it only feel like 2 days ago because you've probably only gotten 2 full nights sleep since then lol. Congratulations on Baby Goose btw.
MotherGooseUPus
MotherGooseUPus - 9/18/2026, 10:38 AM
@ObserverIO - User Comment Image
TheFinestSmack
TheFinestSmack - 9/18/2026, 11:08 AM
"She played the young Carol Danvers in 2019's Captain Marvel, but has since become one of Hollywood's most popular young actresses."

MTTSH claims that every one of Hollywood's "most popular young actresses" is up for a massive MCU role. Out of curiosity, how many of these claims have been true outside of Sadie Sink? And maybe Inde (I forget if MTTSH made a claim about her).
gambgel
gambgel - 9/18/2026, 2:37 PM
@TheFinestSmack - most of MTTS are lies.

and actually it was Jeff Sneider who broke the news of Sadie as Jean.
TheFinestSmack
TheFinestSmack - 9/18/2026, 4:41 PM
@gambgel - that's right! Because immediately after, MTTSH tried to act like they knew about it and then claimed "Sadie signed a multi-picture deal!"

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