This can only happen if Miles got a decent cartoon first.
Spiderman is my favorite hero. and I'm also tired of the "Everything imaginable shits on Peter" freight train that people tend to think is the only way you can write Spiderman. It has me a bit fatigued with him.
I haven't seen that much of Miles. But what I have seen, I liked. The problem is two fold.
There is plenty of characters with Spider powers, all trying to catch lightning in a bottle a second time. Silk, Kaine, Miles, Mayday, Ben Reilly, Mattie Franklin, Ezekiel Sims, Anya Sofia Corazon... replacing Spiderman in the movie is useless and comes out of nowhere unless you have a reason. Like I said, give anyone of those people their own cartoon, let it get popular and ok, we'll be more primed to see the switch.
But this is Spiderman.
He is the Sonic of the Marvel Universe. He is the Mario of the Marvel Universe. He is the Master Chief, Superman, He is the Louis, Francis, Bill and Zoey. We want the originals. We want the brand names. If you want to add the others? Make a cross over flick with Peter Parker as their leader. And hell, here's your dozens of sequels for free: Once they win, show the alternate Spider heroes go to their own universes.
Boom, no need for a stupid origin story. They could have hashed that all out in a SCENE of the spider cross over movie just saying how they got their powers. And once they are back in their own universes, the sky's the limit. Go nuts. and we'll be MORE likely to see it because we already got a taste of how cool they are during the Spider Crossover flick.
You're welcome.