Ra's surprises Batman in the Batcave, seemingly to enlist Batman's aid in rescuing both Talia and Dick Grayson, the first Robin, both of whom have apparently been kidnapped.
In the story "Resurrection Night" in Batman #400, Ra's helps all of Batman's foes to escape from Arkham Asylum and the Gotham State Penitentiary, setting them on a plan to abduct certain individuals across Gotham City who are linked in one form or another to Batman.