I think you're overestimating how much people pay attention to something that, for many of them, is casual entertainment. There are stories about people confusing celebrities they come across in public as other celebrities, and not even ones that they resemble. And since Jean Grey's been in the mainstream for twenty years without being called Marvel Girl, when Marvel starts calling her that they'll naturally think they're attaching her to Captain Marvel for some reason.
I'm sure there will be at least one person who makes that connection inspite trailers, posters and merchandises making it obvious there isn't one
But even if they do, the answer is a google search away. The MCU is a well oiled pop culture machine, and much of that revolves around the internet, and the sharing of information. It's a stretch to say that anyone confused by this in today's age, would
stay confused. Anyone who wants to know or cares enough to ask this question, will get their answer, one way or another.
I also think Marvel is an awfully old-fashioned name for a modern superhero to take on. At least the Marvel moniker was inextricably linked to Carol Danvers, and Captain Marvel has a flow to it. Marvel Girl is more clunky, it's likely out of tone with the movies, it requires Jean to choose an old-fashioned word that's already in use by another superhero in her own world, and it's not even the superhero name Jean Grey is best known for.
Ehhh... "Marvel Girl" isn't anymore outdated than "Spider-Man", or "Daredevil", or "Captain America'", or "Fantastic Four " even. These names are all antiquated and rooted in 50-60s Silver age antics. The only difference is that the latter names are ingrained in pop culture, so they transcended time
A name "Marvel Girl" would be out of place in the Singerverse, but definitely not the MCU. Jean's most well-known superhero name is "Phoenix" but that name comes with a lot negative baggage from past films that Marvel will surely want to avoid.
They've already gone back to "Marvel Girl" in the comics
It's not a stretch to say they are rebranding her for a reason. To get it away from the Fox films.
Yup, it is there, and maybe they'll have Wanda make some guest star appearances in the MCU X-Men movies, shows, etc. etc.
I mean know she's more tied to the Avengers, but for MCU Wanda I feel like they rushed her time with them, and having her more tie to the X-Men in the years to come would really help her especially if she finds out she's not the only one with gifts, she's not alone.
Also if they tie Mutants to the Stones then that could help Creed, Hodge, etc. etc. put fear into people fearing Mutants.
Like they go around telling people the same thing that wiped out half the world population, caused Mutants, they're here to replace humans, and Mutants will unless they do what needs to be done to save the human race from extinction.
Oh, I have been wondering if the villain Arcade would also help make MCU X-Men feel fresh, new, and different from Fox's? .
That would be a great story to explore. WandaVision deals with Wanda's loneliness, and her inability to cope with Vision's being dead.
How great would it be for her discover that she's
not alone, and that she's part of something much bigger. That there are many others out there just like her... Struggling like she is, afraid of their own power like she was. It's something every mutant has gone through
I do look foward to/hope they reinstate Wanda's connections to the X-Men franchise. The comics have been on some BS trying to erase these connections. All of it reactionary to MS not having the rights
Thankfully, that is no longer the case.
Yes to Arcade. Unpopular opinion (prbly), but I'd go with the Ultimate version:
IMO that's an apt modernization. Tying him into "Gamer" culture (Evolution went a similar route) and such.
616 Arcade utilizes Sh'iar technology, so MCU Arcade could get his hand on salvaged Chitauri technology