History
Dr. Brawl used the Super-Adaptoid that she created with a green goo found on the crashsite of an alien spacecraft, to steal the powers of the Avengers so she can use it for personal gain and power. After coming into contact with Captain America, the Super-Adaptoid absorbed also his ethics and moral code refraining from criminal behavior and so abandoning Dr. Brawl that was captured by the Avengers.