Son of Batman makes its debut today on Blu-ray and DVD. To celebrate the release of Warner Bros.' 20th film in the ongoing DC Universe Original Movies series, a new clip has debuted featuring Son of Batman's mother, Talia al Ghul and Deathstroke. Talia is locked in a cell, where her captor attempts to extract information out of her. Deathstroke is quite impressed with the new Robin's fighting skills, and demands to know the true identity of the Dark Knight.