While in the comic, Chewie did become a mommy in later issues but for the movie Goose was played by four tabbies from Animals for Hollywood(named Gonzo, Rizzo, Archie, and Reggie). Reggie is a male, and the cat the CGI is based-on, and the cat taking to the first casting call for Goose. But its funny to read each cat has a specialty, the one to hold, the one to rub the leg, the cat to swipe, and the cat that is just the face cat.
Reggie was the cat that walked or ran around on command, and the most experienced with on-camera work.
We had a few refugee Skrull's in comic, through these were mostly Skrulls runing away from the Skrull empire.
Chief among them John Lennon (well Skrull who adopted personality of John Lennon during beetle mania and stuck with after Lennon was killed).
IIRC he was killed by Invading Skrulls during Secret Invasion.
Regarding the coding of the Carol/Maria relationship, it's definitely true that a piece of the Marvel formula is that there's a love interest who is actually better than the male lead. Sometimes they're even better at the superhero stuff. This is the actual text of Hope Van Dyne in Ant-Man, which is the only film that actually acknowledges and apologies for this dynamic (still without correcting it until the sequel), but Gamora is the other most blatant example. But more often the lady just has her shit more together emotionally or philosophically and the hero needs to learn to be more like her: Nakia, Jane Foster, Christine Palmer, Pepper Potts. Very often the romantic relationship doesn't quite come together at the end of the first movie, since the hero still has some growing to do. It's not an inerrant pattern (it's not present at all in the Avengers films and is much weaker in all of the sequels), but it's pretty expected especially in the debut movies.
So, who fills this role in Captain Marvel? Well, it's not just a straight gender flip because is sure isn't Fury (he's more of a secondary audience PoV character, since "Vers" was a bit alien and the script benefited from an earthling foil). Maria is the one who Carol has an emotional connection to and has something to teach her so Carol can complete her emotional arc. In a Marvel movie, that's the love interests' job. No wonder it comes off as queer coded.
My mom was just talking about three of her McDonald's Mafia (my name for them, the local grandmothers getting together for lunch and gossip) took one of the grandsons to a showing, and all three of them fell asleep because the movie was so "boring" while the kid thought it was so-so.
I found it refreshing, for them the only controversy was just the movie being boring for ladies in their 80's.