The name suggests a pre-Superman drama set on the planet Krypton, maybe involving the House Of El, maybe Brainiac, maybe an end of the world cult, maybe lots of dragons flying around the place.
Goyer also wrote the screenplay for The Man Of Steel also portrayed some of the Kryptonian lifestyle, as some kind of communist dystopia for which the USA was a blessed relief and alternative. Comics such as the World Of Krypton stories and For The Man Who Has Everything have explored aspects of Krypton, that it would feel hard for such a show to completely ignore.