Casting HBO's Justice League Dark
4. Doctor Fate - Tommy Flanagan
The version of Doctor Fate that will appear in Justice League Dark will most likely be Kent Nelson, who discovered the helmet of Nabu back in the 1920s and went on to co-found the Justice Society of America. Nelson is a good guy, Nabu often is not, however, and has a tendency to possess Nelson via the helmet. As such, the good Doctor often straddles the line between hero and villain.
Tommy Flanagan, of Sons of Anarchy and, much more recently, Westworld fame would straddle this line expertly.
His characters are usually not very nice people, yet it is that assumption of villainy that would make his Doctor Fate so interesting - audiences would never quite be sure if it were Nabu or Nelson in control. The Justice League Dark is more a team of anti-heroes than heroes anyhow.