I’m absolutely loving that from what we can tell, the theme of the movie is the theme of loss and choice intertwining.
All these Spiderpeople, they have to make the choice of the multiverse over their loved ones and morals.
Is it sacrifice or is it destiny? Is it a sacrifice to lose all their loved ones or is it destiny because they wouldn’t have become a hero without that loss?
How far are they will to go to save the multiverse? Should let their loved ones die at the cost of the multiverse being saved?
It’s the choice of “saving one person or saving everyone” which is an amazing callback to the line, “You can’t think about saving the whole world. You have to think about saving one person.”
And it’s also a choice about morals. How far are they willing to go? How far are Miguel, Jessica, and Peter. B willing to go for their kids? Will they kill, will they let others die so the future have a choice in their destiny?
And compared to Miles, who is apart of the next generation, is being told no over and over again. That his story is already been written, that he can’t save his loved ones, and that he must lose himself in order to save the multiverse. And Miles responds with a resounding no. He was bitten by a spider from another universe, a spider that was not meant to be in his universe. He is the representation of choice, surrounded by a web of destiny and Miles is gonna do it his own way.