The reboot of the Amazing Spider-Man has hinted in the past two films that they are building a team of super villains to come after Spider-Man. The Sinister Six is composed of six of the wall crawler’s foes who join forces to finally take him down. The group seems to be developing in the movies a bit differently than in the comics.
The first two movies have introduced four villains outright and possibly suggested some additional villains. The villains already introduced are the Lizard, the Green Goblin, Electro and the Rhino. There are also villains who are suggested through a few scenes in the development lab of Oscorp. It would appear that the film showed the metal tentacles of the Doctor Octopus suit and possible the flying suit for the Vulture. While some of this is pure speculation, it does make sense that the Spider-Man franchise is moving in this general direction.
Another potential villain is the person who keeps appearing at the end of the story. The first film had the man appearing to Curt Connors (The Lizard) following his imprisonment and in the second film the same man appeared with Harry Osborn. There are a few possibilities of who this character might be. One possibility that is highly speculated is that this is Mysterio. Mysterio was an enemy of Spider-Man and a member of the Sinister Six.
Another speculated identity of this man is that he is the villain Mister Fear from the Daredevil comics. It seems unlikely that they would bring in a totally unfamiliar villain with Spider-Man when they are trying to build the Sinister Six. This character could be someone completely new and unrelated to the Sinister Six and is an associate of Norman Osborn.
Here is a list of possible members of the Sinister Six based on the Amazing Spider-Man films.
The Lizard was placed in a mental institution at the end of the first Amazing Spider-Man film
The Green Goblin appeared in the Amazing Spider-Man 2 and seems to be building the Sinister Six
Electro appeared in the Amazing Spider-Man 2 and appeared to possibly be dead near the end of the movie. However, Electro had the ability to travel through power circuits and may be back in the future.
The Rhino was at the end of the second film and the movie ends with a battle between Spider-Man and the Rhino.
In the development division of Oscorp, the Doctor Octopus suit is waiting for someone to use it to become another of the villains.
The wings of the Vulture were next to the tentacles of Doctor Octopus.
The Black Cat
Harry Osborn’s assistant named Felicia may be Felicia Hardy who is the Black Cat
While we do not know who the mystery man is, it can be assumed that he will be somehow a part of the next film.
The Sinister Six may be on tap for the next film in the Amazing Spider-Man series. Fans will have to wait until June 2016 to have their questions answered.