What Happened to Electro in The Amazing Spider-Man 2?
Electro begins as a mild-mannered electrician named Max Dillon, who Spider-Man saves before he becomes one of his most dangerous foes. Like so many of Spider-Man's villains, he works for Oscorp, where an accident transforms him into a human generator. After he accidentally causes a blackout, Spider-Man stops him, and he gets sent to a German institute to be "studied." Harry Osborn breaks him out before he slowly transforms into the Green Goblin, and they team up against Spider-Man. Peter and Gwen defeat Electro by overloading him with electricity.
Why is the Electro in Spider-Man: No Way Home?
Electro is seen in the No Way Home trailer, but with a noticeably different appearance. Instead of his electric-blue appearance from The Amazing Spider-Man 2, he looks just like his normal, human self, just with radiating bolts of lightning.