As you can tell from the image above it’s the Vulture. here’s what Comic Book Movie had to say:
“We can 100% confirm that Colm Feore is actually playing Adrian Toomes aka The Vulture in The Amazing Spider-Man 2. And that’s not all — apparently he will join forces with Rhino, Electro and Green Goblin to form the first four members of The Sinister Six, setting them up for the threequel.”
The rest of the villain team is unknown at this time, but it’s always possible The Lizard could return as one of them. There was also rumors of Harry becoming Venom down the road, but father and son on the same team might not work.
They go on to say:
“It also seems that we can forget all that stuff about Norman Osborn not taking up the Green Goblin mantel in the movie! Chris Cooper was spotted on set as Goblin (head in place;) battling Spider-Man, and we’re told they’ll likely be duking it out in the movie’s climax, no doubt leading to the death of Miss Gwen Stacy (Emma Stone).”
That’s pretty epic news.
Who else do you want to fill out the Sinister Six roster?
Source: Comic Book Movie