At the time, the man behind the mask was still hidden, up until DC Entertainment president and chief creative officer Geoff Johns confirmed the addition of Manganiello. The information was released during his first interview discussing his new role overseeing the new department under Warner Bros. When asked if Deathstroke would make a cameo in Justice League, Johns declined to disclose further information on the upcoming superhero team-up. While Justice League is currently shooting in London, the first standalone Batman film by Affleck is likely to hit theatres in 2018, but the actual date is yet to be confirmed. Both Geoff Johns and Ben Affleck are writing the script to the Batman movie, while the latter will also be directing and starring as Bruce Wayne.
Source: Dhaka Tribune September 10, 2016 12:33 UTC