Son of Batman

Son of Batman is a directtovideo animated superhero film which is part of the DC Universe Animated Original Movies. It is an adaptation of Grant Morrison and Andy Kuberts 2006 Batman and Son storyline. The film was released as a digital download on April 22, 2014, and was released on physical media May 6th, 2014.

In Gotham City, Batman confronts Killer Croc, who is stealing mutagenic chemicals and steroids to enhance himself, to the point where he grew a reptilian tail. Batman gets ambushed by Croc before Talia electrocutes Croc from behind. She tells Batman about her fathers death and leaves their son in his care, though Damian believes that he can take care of himself and does not need Batman. Although Damian wants to avenge Ras al Ghul by killing Slade, Batman objects to this. Slade, now calling himself Deathstroke, captures Dr. Kirk Langstrom, who was working with Croc to enhance him in return for the mutagenics he stole and also had worked with Ras, promising a formula for his soldiers. Slade threatens Langstroms family to force him to recreate the ManBat formula for him and his soldiers. Damian bypasses Wayne Towers security to speak to Bruce, telling him about Slades contact, Ubu, who was part of the raid on the Leagues headquarters and is stationed in Gotham. Although Damian wants to avenge Ras al Ghul by killing Slade, Bruce objects to Damian wanting to kill. Talia is captured by Deathstroke when she and some remaining League members attack his compound.Against Batmans orders, Damian leaves the Batcave and, after a chase and a long fight, defeats Ubu, whom he located by accessing the BatComputer. Before Damian can kill him, Nightwing arrives, mistakes him for a criminal and subdues him before bringing him back to the Batcave. Batman berates Damian for his recklessness, willingness to kill and exposing their operation. Batman then has Damian don the mantle of Robin to teach him discipline. Searching for a lead on Langstroms location, Batman goes to Arkham to interrogate a rabid Killer Croc, who supplied the mutagens to Langstrom in exchange for his enhancements and is currently going through drastic, agonizing withdrawal symptoms that cause him to shed his scales and tail. Since others are too afraid of him to medicate him without being harmed, Batman promises Croc

Source: Wikipedia