AD Micheal Lamb would often draw obscene words, phrases or pictures on the clapboard at times to loosen the crew up when shooting would go long.
Actress Cassandra Bryson described the Raven costume as painful to wear.
The garage scene took over 15 days to shoot due to changing light and short days in the fall of 2015. Filming on this scene didn't complete until June 2016.
There were 2 Deathstroke helmets created. 1 with both eye holes and one with just the one eye hole. 2 were needed to perform some of the more advanced fight choreography displayed in the film.
The film is loosely based on The Judas Contract storyline. It also contains elements from the Identity Crisis storyline and the Arkham Origins video game.