Freedom League: Rebirth
Lord of the Terminus
Omega is the ruler of the Terminus, the void beyond the omniverse populated only by the ruins of destroyed dimensions. Omega is Destruction incarnate, a conqueror of dimensions driven by a desire to see all known universes reduced to nothingness.
Omega and his forces invaded this dimension in 1993, causing severe destruction across the planet. All the heroes of Freedom City and Earth united to stop the Terminus Invasion, and the invasion only ended when the Centurion sacrificed himself to deliver a devastating blow to the Lord of the Terminus.
While Omega was forced to retreat back to the Terminus, he is still out there in the multiverse. Some say he has forgotten this dimension, others say he is merely biding his time until he can start a second invasion, absorbing this dimension into the inky black void that is the Terminus.