Tonguez
A suffusion of yellow
Ok, I am not all too familiar with DC/Superman, but didn't the Kryptonians not have any superpowers at all because their sun is the "wrong" color or something? If yes, what exactly will the series be about?
Its not always clear some depictions of Krypton have given them all powers whereas others link their powers to the colour of different Stars.
However overall Kryptonians appear to be naturally stronger, faster and more intelligent than humans. Also part of Kryptons advance crystal technology involved utilising directed stellar radiation on a cellular level, with light from quasars etc giving powers.
I suppose if we have Jor-El as a Crystal-tec scientist and Major Zod as a rising military leader then they could see a utilisation of crystal-tech to enhance their natural abilities. We'll definitely see the advanced AI that becomes Braniac.
and hopefully lots of bug-dragons
EDIT: and yeah like Morrus said, its all speculation since all we have is a title...