The Marvel Comics character Deadpool is similar to Deathstroke. Deadpool commonly uses the name "Wade Wilson," similar to "Slade Wilson." In Superman/Batman Annual #1, written by former Deadpool author Joe Kelly, Deathstroke from the antimatter universe appears and has similar characteristics to Deadpool (such as Deadpool's "merc with a mouth" wisecracks, and a black spot on his mask over his eye somewhat resembling Deadpool's). While this character did not seem to be as skilled at fighting as Deathstroke, his healing factor seemed far more effective, with Slade becoming annoyed at how hard he was to kill. This character tries to introduce his name multiple times but is always interrupted. The most he was able to get out was "Dea-". It could be implied that Deadpool is the Marvel counterpart of Deathstroke, who was created eleven years earlier. Marvel seemingly acknowledged this in the Cable/Deadpool series, where Deadpool sometimes answers a letters column. Deadpool claimed that he did not want to be in a Marvel/DC crossover, because people might mistake him for a certain DC character.