On your program guide for SyFy, you'll notice that tomorrow night a featurette called "Krypton: Making of a Legend" will air in the 11 pm time slot. If you don't want to wait that long, SyFy has released the featurette online.
The intro features Geoff Johns, Brian Michael Bendis, Jim Lee, Scott Snyder, and others Superman's impact and the importance of Krypton's legacy. Hosted by Cameron Cuffe (Seg-El), as he stands on the set in Belfast where the Fortress of Solitude scenes are filmed, the 22 minute long commentary dives deep into the world of Krypton including the origin of the series.
Take note, however, that there are spoilers for the show and because we're exploring a history that hasn't really been revealed, some viewers may not want to watch it until they've seen the pilot which airs March 21st.