I did find it curious that Parker didn’t recognise Gwen, who is a pretty important character to his development meaning that she was never a thing in his universe. We never had a chance to know if Pine’s version knew her which would have been interesting.
I think this was probably a combination of
1) The creators not wanting to further complicate the emotional through-lines of the three characters -- aka, Alt!Peter's main emotional hangups need to be his marriage and his self-esteem, not revisiting his feelings about his ex; Gwen being re-contextualized as a Millennial feminist superhero with relationships and problems of her own, rather than as the empty-personality-with-a-pretty-face the original version of Gwen was in the comics; and the subtext of Miles dealing with his own self-esteem issues vis a vis his desire for female approval from Gwen and realizing he needs to be emotionally independent
and respectful of Gwen's agency; and
2) The desperate, desperate need to avoid the "ew gross" factor that would inevitably be the subtext to any scene involving a middle-aged divorced man seeing a teenage girl as the mirror of his dead ex-girlfriend. Especially since this movie is marketed to kids.
Anyway, it works better if we just assume that either 1) Alt!Peter didn't have a Gwen Stacy in his universe, or 2) Alt!Peter has chosen to recognize that the Gwen he meets in Miles's universe is a different person from his Gwen, one whose circumstances are so radically different from those of the Gwen from his world that it would be inappropriate for him to even allude to having known or had any sort of relationship with her counterpart in his dimension.
I also would have liked to know if Parker got back with MJ.
I would have, too, but in a way it really doesn't matter. Because whether or not Alt!Peter and Alt!M.J. get back together, Alt!Peter's character arc is complete -- he has re-learned, through his mentorship of Miles, to take that leap of faith and believe in himself and take charge of the direction of his own life again. That may or may not entail reconciling with M.J. -- but either way, he's learned that his happiness is not dependent on his relationship with her, but on his taking back responsibility for the course of his life.
But that brings up something else. In this film, when two Spiders meet in this film, they get a sort of spider-sense resonance going on where they can tell they are each spiders. But nothing happens when Miles and Gwen interact after he has his powers.
Correct me if I'm wrong, but Miles first meets Gwen
before he gets spider-powers, doesn't he?
Either way, you could just write it off as Miles
did get a spidey-sense reaction to meeting Gwen, but he was so infatuated with her that he just thought it was butterflies in his stomach.
Technically Miles is half black, half Spanish. Trying to cover all the bases with him.
I mean, I have two Afro-Latinx friends. I'm pretty sure they're not Afro-Latinx because they're trying to "cover the bases." They're Afro-Latinx because they have African/African-American and Latinx heritages. Because Afro-Latinx people are real.
So, maybe -- just maybe -- when Brian Michael Bendis and Sara Pichelli created Miles Morales, they made him Afro-Latinx because they recognized that Afro-Latinx Americans are real people and worthy of having stories told about them (especially if the story being told is supposed to reflect what New York is like today), not out of some cynical desire for tokenism.
Just maybe.