Superman/Batman. Supergirl (DC Must-have)

Supergirl's debut in modern DC continuity! After locating a kryptonite asteroid in Gotham Bay, Batman discovers a ship embedded in the rock, inscribed with symbols from the lost planet Krypton. Inside lies a girl who speaks an unknown language and appears to possess powers comparable to Superman's. When the mysterious young woman and the Man of Steel meet, he discovers that she comes from his home planet and is none other than his own cousin, Kara Zor-El.