Superman: Nightwing and Flamebird

Argumento

In Superman’s absence, two new heroes arrive on Earth from out of Kryptonian lore! Following the startling events of “New Krypton,” Earth finds itself without Superman! And this world without a Superman is a very dangerous place indeed. The only thing standing between the good (and the not-so-good) citizens of Earth and the shadow of doom are the all-new Nightwing and Flamebird. But who are these two heroes who have taken their names from legends of Krypton’s past?