The movie was released on August 4th, 2016, the same day as "Suicide Squad". This also happens to be director Tom Vujcic's birthday.
Necro and Mr Hyde's scenes were both filmed in New York City, whereas everyone else was filmed in Toronto.
Sid Wilson's scene was filmed on the same day that Slipknot made a stop in Toronto during the leg of their 2015 tour.
The Mr. Freeze and Scarecrow scenes were filmed on the same weekend that Reel Wolf shot the video "Dead Body Disposal" for Necro, starring Peter Greene.