Atsym Sknyfs
Superstar
they won't reveal that because it will spoil future films, but i assume it's none of the A listers. Based on the villians the MCU has been using so far.
So far the MCU has used: Vulture, Shocker, Scorpion,Tinkerer, and The Prowler. Mysterio,and possibly Chameleon are next. All bottom Tier spider man villains that have never been used before in film.
Meaning spider man 3 will follow this trend and use some bottom of the bucket dude thats never been used before like, Hammerhead or Hydroman.
they'll find a way to make good though. MCU does a good job these days.
but those MCU spider-man villains all belong to SONY ... they are not MCU villains