On the morning of August 29, 2016, Batman star and director, Ben Affleck, released a short piece of video via his personal Twitter account depicting Deathstroke in what appears to be some type of green screen test, which is taking the internet by storm. Numerous media outlets are reporting different things, but at this time there is no confirmation if this is a scene from the Justice League film currently in production or if it is some kind of test footage for the currently-in-development Affleck-directed Batman solo film. The only thing that can be confirmed is that the footage was definitely released by Affleck himself. In any event, this footage seems to the confirm rumors of Deathstroke's involvement in the ever-growing DC Extended Universe, which have circulated ever since Arrow executive producer, Marc Guggenheim, when commenting on the chances of Slade's return to the series, stated that, “The character of Slade Wilson is currently tied up in another DC project." The footage itself is without sound and appears to have a CGI rendered set from which Deathstroke is walking menacingly toward the camera. The footage can be seen below.
(UPDATE: Ben Affleck is no longer attached to a new Batman film. The video originally posted below has since been removed.)