This morning Ben Affleck drop this tweet
— Ben Affleck (@BenAffleck) August 29, 2016
The character is Deathstroke, one of DC’s deadliest foes. Deathstroke has been around for over 30 years and he’s truly a force to be reckoned with.
This tweet seems to be teasing an appearance in Justice League. It would make sense, but let’s keep in mind that DCU has a record of misusing characters, so… I’m hoping for the best.