film Batman Beyond: Return of the Joker, Batman asks if all of the original Batman's associates were bitter when they left to which Barbara Gordon replies "...look up Nightwing someday. Has he got stories". Barbara also mentions that Grayson had left Gotham following The New Batman Adventures prior to Robin's capture by Joker and Harley Quinn. Nightwing has a cameo appearance in the Justice League Unlimited episode "Grudge Match". As Black Canary enters Blüdhaven, Nightwing can be seen on a rooftop next to two gargoyles. Nightwing appears in the Teen Titans episode "How Long is Forever?", voiced by Scott Menville. Nightwing is Robin's identity twenty years in the future. Nightwing has been featured in The Batman, voiced by Jerry O'Connell. In the episode "Artifacts", the year 3027 have flashbacks to the year 2027 which features Nightwing. Although he has been active for a decade as Nightwing, he is still called 'Robin' by Batman and Oracle much to his annoyance. In the episode "The Metal Face of Comedy", Nightwing (in his original costume) appears as Dick Grayson's video game character in an online role playing game. Nightwing appears in Batman: The Brave and the Bold, voiced by Crawford Wilson. Dick Grayson initially appears as Robin, but becomes Nightwing at the end of the episode "Sidekicks Assemble!" and appears as Nightwing in later episodes. His suit is based on his Tales of the Teen Titans #44 suit. A Nightwing animated series was in development before being shelved in favor of Young Justice. Nightwing appears in Young Justice, voiced by Jesse McCartney. He is the leader of the Team, assigning missions to his friends and sometimes fighting side by side with them. At the end of season 2, Invasion, he leaves the team. Later in the third season, Dick Grayson is the leader of the Outsiders and worked behind the scenes with Batman Inc. In the fourth season, one year later, at twenty years old, he is called back to the original Team by topmost-level sorceress Zatanna to use his detective skills in finding Superboy and bringing him back from the Phantom Zone. Upon discovering Superboy alive, the team stumble on an evil plot by Superman's nemesis, General Zod, who leads an invasion on Earth with a small army of Kryptonian criminals. Thankfully, Nightwing, the Team, the Legion of Superheroes, and the Justice League band together and stop the Kryptonian villains by sending