Deathstroke

Deathstroke, also known as Slade Wilson, is an enemy of Nightwing and the Teen Titans.

Biography
Genetically modified by the military to be the perfect soldier, Slade Wilson, better known as Deathstroke the Terminator is a deadly foe. He has a particularly strong grudge against the Teen Titans.

Batman: The Adventure Continues

 * Arkham City
 * All Grown Up (first apperance)

Justice League Heroes

 * The Terminator
 * Final Countdown, Part One
 * Final Countdown, Part Two (final apperance)

Teen Titans: The Animated Series

 * Nightwing and Friends
 * Robin the Terminator
 * Blast to the Past, Part One
 * Blast to the Past, Part Two
 * Titans Forever
 * Speedy's Out
 * Deathstroke V.S. Nightwing
 * Knight Time