Teen Titans A-Z : Deathwing

Deathwing

Introduced as an alternate Dick Grayson from a timeline when his Titan teammate, Donna Troy, had a son who was driven mad, took on the mantle of Lord Chaos and conquered his world. This version of Dick stayed in his identity of Nightwing and helped train squadrons of superpowered teenagers that became known as the Team Titans. He was involved with the much younger Titan, Mirage, during this time. This alternate-future Nightwing came back in time and briefly joins the Team Titans when their mission takes them to their past, our present. This version of Nightwing, attacked and corrupted by a dark version of Raven shortly after his arrival, changes his name to Deathwing, and serves as her assistant. He becomes so twistedly evil, he at one point tracks down his one time lover, Mirage, and rapes her. She becomes pregnant and has a child named Julienne

During the Zero Hour event that retroactively erased this timeline, Mirage, Terra and Deathwing survive. It is later established that they are from the current time-line, and were shunted through time and given false memories by the Time Trapper, who wished to use them as sleeper agents against the time travel villain, Extant.

It wasn't revealed until one of the later runs of the Teen Titans that this was not Dick Grayson, in fact his true identity was never uncovered. After this storyline, this version of Nightwing has not been seen since. Whether this version existed at all, after the events of Infinite Crisis or would later to be revealed to be an alternate Dick, Jason, or Tim, is unknown.