The Cube was originally a S.H.I.E.L.D. black facility, one of nine classified bases. The Cube was a prison for alien criminals who committed crimes on Earth. It was here that the "Marvel Boy" was imprisoned after his brief assault on the US government. He boasted that he would make it the capital of a new Kree empire, a threat he later made good on after the superhuman Civil War.
During the Superhero Civil War, the sadistic warden approached S.H.I.E.L.D. to use Marvel Boy, brainwashed by his experiments, as an efficient asset against the children of the Pride. Due to interference of the Young Avengers, Marvel Boy did indeed take control of the facility.
Marvel Boy used his advanced technology to begin rehabilitating the alien inmates, but the Skrull Virus that attacked all Stark Tech equipment during the Skrull Invasion destroyed his efforts. This allowed all the inmates, to escape.
Staff, teams and wards
Marvel Animated Universe (Earth-8096)
The Cube is one of four specialized, high security prisons maintained by S.H.I.E.L.D. along with The Big House, The Vault, and The Raft. The Cube was specially designed to contain radioactive and Gamma irradiated prisoners.
- Radioactive Man (Currently imprisoned in an unknown facility)
- The Hulk