Justice League is currently set to go down as one of the greatest superheroic disappointments of all-time. The film was supposed to be the culmination of years of plotlines in Man of Steel, Batman V Superman: Dawn of Justice, Suicide Squad and Wonder Woman, properly launching the expansive and exciting DC Universe on the big screen in a spectacular manner. A famously tortured production, though, including director Zack Snyder leaving the project and being replaced by Joss Whedon, culminated in the mess that was finally squirted into cinemas late last year.