from: wikipedia
Mortal Kombat vs. DC Universe: Worlds Collide
As of June 25th 2008, Deathstroke has been widely speculated and now "semi-confirmed" to be among the DC roster in the upcoming video game title Mortal Kombat vs. DC Universe: Worlds Collide, which is slated to comprise of 10 - 12 characters from each of the MK and DC Universe. The term "Semi-confirmed" was used because a magazine article was recently released that stated one of the DC Villains appearing would be a "perfect counter" to Jax and Sonya, as well as DC's answer to the "ninja factor" in the MK series.