Durla - Original Timeline - Young Justice: Phantoms

In the 31st century, ten years after General Zod and his Kryptonian army were released from the Phantom Zone, Durla was conquered and enslaved. 

Because of this, a time-displaced Chameleon Boy, a member of the Legion of Superheroes and native of the planet, had reservations about releasing Zod in 2020, fearing they would enact this a century earlier than in the previous, untampered timeline.