Nightwing
Nightwing is a fictional superhero appearing in American comic books published by DC Comics. The character has appeared in various incarnations, with the Nightwing identity most prominently being adopted by Dick Grayson when he moved on from his role as Batman's vigilante partner Robin.
Nightwing
Following this, Nightwing decides to leave the team again, due to the events of the "Batman R.I.P." storyline, and due to Batman's apparent death, Nightwing feels his attention should be better aimed at protecting Gotham City.
As a precursor to "Batman R.I.P.", at the New York Comic Con 2008, DC Comics gave away pins featuring Nightwing, Jason Todd, and Hush with the words "I Am Batman" beneath them.
During the storyline, Nightwing is ambushed by the International Club of Villains. He is later seen in Arkham Asylum, frothing at the mouth and presumably drugged, believed by the staff to be Pierrot Lunaire, a member of the Club. Scheduled for an experimental lobotomy by Arkham himself, he's spared by the ICoV taking hold of the Asylum, wanting to use him and Jezebel Jet, Bruce's fiancée at the time, as bait.