Voice acting cast seems great. Donald Glover is a solid choice for Miles. Edit: I think I was wrong, has an official cast been announced for the movie?
And then we have Lord and Miller writing and directing. These are the guys behind Jump Street, the Lego Movie, and Cloudy with a Chance of Meatballs. I really enjoyed all of those movies, so I'm really excited for this.
The only negative is they were suppose to write and direct the flash movie, but they quit that for this. Why couldn't they do both

?
Why should he be in the MCU? Peter is the better choice. He has better villains, a better cast (MJ, Gwen, Flash, JJ, Aunt May > Ganke, Mile's Parents), more stories to adapt from and is more well-known. People didn't like Amazing Spider-man, they want a good Spider-man & Peter Parker movie. And Marvel is delivering that. .