It's incredibly lazy.
A far more interesting way to make a "black girl Iron Man" would be for this freak genius to build her own suit in her dorm, emulating her hero Tony Stark, with the usual naive intent to 'use her gift to fight crime'. Given her apparent background, that would be hood crime a la Chicago rather than interdimensional alien orcs riding flying metal robo-cod. So far, the same. To add some interest, the suit she makes is different/better in some way than what Tony Stark has developed, because why would two geniuses pursuing the same idea end up with the same result?
But then have Tony Stark become aware of her, and kindly dissuade her from her "calling" because he knows how dangerous it is, physically, morally, personally, psychologically - for an adult, let along a 15 year old girl. Because she's a black woman college student, and it's [current year], she naturally interprets his empathy and caution as sexism and racism, which tarnishes her adoration for him. Now you have a potential rival to Tony Stark, who wants to do good, but is morally conflicted and embittered over the perceived insult due to her naivete and pride as a function of her youth and lack of perspective - and feminist brainwashing at college, though the writers couldn't state that explicitly without triggering a shitstorm. This could be an opening to her turning into a villain, or being recruited by villains, etc. But the character is too inherently virtuous for that. Instead, she goes her own way.
She takes on her *own* identity as a result (rather than taking over the Iron Man identity as is currently planned), and occupies a place between hero and villain as needed for interesting story development. Now you have a new character that the purported throngs of young black women pining for a "representative" character of their own can "identify" with, a minority character who is original and not merely re-cast for "diversity" (which has to be insulting if you're in the group being pandered to), a character that's just plain interesting whether you're minority or not, you don't damage the original brand, and you've opened all sorts of new paths for future storytelling.
I'm no comic book fan so I don't know the conventions of the genre. But here I can come up with a plainly superior alternative implementation of their diversity wet-dream in ten minutes of brainstorming from the barest of knowledge of the characters and fictional universe gleaned from MCU movies.
These clowns don't even try.
otd:
