Considering anything Young Avengers is probably years away her age makes a lot more sense than Hailee, & Kathryn whom are both probably gonna be on the edge of 30 when YA happens.
The way that I see it, MAC didn't need to be in DSITMOM any more than Spider-Man needed to be in Captain America: Civil War. Sometimes they just want to introduce a character and choose whichever movie they think will be the best starting point. If people are gonna like her or not, that's another story. But it's just normal world building for their universe. If it wasn't America, it was likely going to be some other character they had plans for anyway.
I'm still waiting for them to confirm whether Clea is actually in it, although at this rate she'll just be a Christine Variant.
I feel like the original MCU Avengers all leaned into their late 30's (maybe Steve was still in his 20's since his enlistment and being frozen).
I think Wanda was ostensibly 18-20-ish given how they referred to her initially.
With all the talk of who is going to be in Multiverse or Madness....Marvel should hire a bunch of DC actors to play the Squadron Supreme.
Try to tell me people wouldn't lose it over that.
T'Challa
A.K.A. The Black Panther
King of Wakanda
King of the Dead and The Champion of Bast
Two-Time Time Magazine "Person Of The Year"
Six-Time People Magazine "Sexiest Man Alive"
I have said the exact same thing!
But I don't want just any DC actor. I want Cavill as Hyperion, Gadot as Warrior Woman, and Afleck as Nighthawk. Maybe Fisher as Doc Spectrum, since I don't believe Cyborg has a classic Squadron counterpart?
If you're gonna troll DC by using their actors as the evil MCU JLA, don't halfass it.
"We all know the truth: more connects us than separates us. But in times of crisis the wise build bridges, while the foolish build barriers. We must find a way to look after one another, as if we were one single tribe."
~ Black Panther.
Hopefully the new Dr. Strange movie will be successful. After the modest returns for Eternals, and the technically Sony-produced (financially) Spider-Man film, I suspect that the Disney wing of the MCU wants another qualified hit on its hands.
hopefully Sam Raimi can pivot to being the show runner for a horror based Disney Plus show. Man Thing, a Daimon Hellstrom reboot, the Zombie, Mephisto, Terror, Inc., The Darkhold, etc.
This is just a comment, but all things considered, if Marvel tries to adapt the Squadron Supreme into the MCU, how do you think they will do?
All things considered, I believe the most logical thing to do would be to hire the actors from the DC's movies and put them as the counterparts of DC inside Marvel. You know:
+ Henry Cavill (Superman) as Hyperion.
+ Ben Affleck (Batman) as Nighthawk: Although considering he was also Daredevil, maybe they should use another actor.
+ Gal Gadot (Wonder Woman) as Power Princess.
+ Ezra Miller (Flash) as the Whizzer/the Blur.
The only problem here would be the actor for Doctor Spectrum (Green Lantern), as the only one I can think of it is Ryan Reynolds, but he would appear in the MCU as Deadpool.
With the facial scar make up Reynolds uses for Deadpool it would not be an issue.
Overall though...while it would be fun as a one off like I suggested above to use the DC actors to play the SS...for long term storytelling I would assume they would cast different actors.