Chameleon (comics)
The Chameleon was born a Soviet citizen named Dmitri Smerdyakov (Дмитрий Смердяков). In his youth, he was a servant and half-brother to Sergei Kravinoff and eventually became a minor associate to Gustav Fiers. Although Dmitri and Sergei were friends, Sergei was often abusive to Smerdyakov, leading to a combination of admiration and resentment towards Kravinoff. Eventually, Smerdyakov emigrated to the United States of America. As he had made a talent for himself during his youth, impressing his brother by impersonating friends and neighbors, he assumed an even more impressive disguise: the identity of Chameleon. During his first known criminal outing, he impersonated Spider-Man, though he was exposed and arrested. Shortly afterward, Kraven the Hunter himself came to America, and the Chameleon set his old associate's sights on Spider-Man. Both men became long-time enemies of Spider-Man, part of his primary rogues' gallery.
Ends of the Earth (Marvel Comics)
In a flashback, the Sinister Six are shown stealing objects from around the world to further their plans. In the present at Palazzo Senatorio, an international meeting of the world's greatest minds and the world leaders is held to discuss Doctor Octopus' offer. The Avengers and Spider-Man try to convince the leaders they cannot negotiate with a supervillain. When Al Gore says that Doctor Octopus would save them, Spider-Man punches him, revealing to everyone that Gore is the Chameleon in disguise. Spider-Man explains his new costume can detect which person is actually Chameleon. Meanwhile, at Horizon Labs, Mayor J. Jonah Jameson gives orders to shut down the laboratories, saying he doesn't care about the rest of the world. Back in Rome, a transmission from Doctor Octopus states he has activated the Octavian Lens which are blocking the harmful UV rays from the sun in order to reinforce his offer. Spider-Man is forced to let Chameleon go, but secretly places a Spider-Tracer on him. They follow Chameleon to the Mediterranean Coast where the rest of the Sinister Six is waiting. Although Thor is able to hurl Electro into the upper atmosphere, the Sinister Six successfully subdue the Avengers using the objects stolen in the flashback. Doctor Octopus says he has succeeded in another goal, defeating Spider-Man.