Ben Affleck is not necessarily the man you might expect to be posting tease-filled Twitter videos, but since he took up Batman's cowl, this has been part of his world. Affleck put up a video of one of DC's iconic baddies Deathstroke , and now The Wrap has learned that the lethal character will be the main antagonist in the actor/writer/director's planned stand-alone Batman movie. https://t.co/0NsNzCtGip — Ben Affleck (@BenAffleck) August 29, 2016 Created by Marv Wolfman and George Perez, Deathstroke first appeared in Teen Titans #2 in 1980. Slade Wilson (as his family knows him) is an assassin and a mercenary, and while he's more often found in the Green Arrow's rogue's gallery – and has turned up on the DC TV series – he has crossed Batman's path several times. Their memorable first meeting was in a 1991 Deathstroke comic story arc titled City Of Assassins, where Deathstroke beat the Dark Knight to a pulp. There's no indication yet as to wheth