While deaing with a more or less routine monster attack at STAR Labs (and where else but in Metropolis could you say that?), Superman found himself being teleported unexpectedly into deep space and brought before the Tribunal, an alien judgement body that charged him with guilt by bloodline of genocide in the destruction of Krypton. Although Superman made an attempt to escape, he was captured and returned to the Tribunal's custody--by the Cyborg!

The Cyborg, it seems, had put the Tribunal on Superman's trail to begin with. Unfortunately for the Cyborg, the Tribunal recognized him as a galactic criminal as well, and sentenced him to banishment within a black hole.

On Earth, meanwhile, the Alpha Centurion had alerted Superboy, Supergirl, Steel, and the Eradicator about Superman's plight and convinced them to travel into deep space with him. Unfortnately, they too were taken prisoner by the Tribunal. When the Cyborg was revealed to be the reason for their capture as well, all the members of Team Superman fought valiantly, and were eventually able to make a triumphant return to Earth.