The battle that had to happen is here: Supergirl vs. Superboy! After last issue's titanic tussle with Power Girl, why is Kara going toe-to-toe with the Boy of Steel? And where do the rest of the Teen Titans fit into all of this? Plus, Lex Luthor makes his move! Join the superstar team of Jeph Loeb, Ian Churchill and Norm Rapmund as they continue to rocket the new Girl of Steel into hyperspace!