Krypton Cameron Cuffe is Seyg-El

http://www.denofgeek.com/us/tv/krypton/241974/krypton-tv-series-unveils-new-teaser

"Seyg-El is the scion of the once prosperous El family and is blessed with an intuitive brilliance for all things technical. He is now living in Krypton’s lowest caste after his family was stripped of its rank."

"It's a show that, although it takes place centuries ago on Krypton about the House of El, it's about a conspiracy from the present that has traveled back in time to to Krypton to prevent Superman's legacy from ever happening," DC president Geoff Johns said at SDCC.
"Adam Strange and Hawkwoman come to Krypton trying to stop the conspiracy and save Superman's legacy," Johns revealed. "Doomsday will be in the show. Brainiac is long overdue to be on screen like that."