After Matt Ryans Constantine popped up earlier in the season, many were wondering why Hellblazer hasnt appeared since then. Well, in Taken we got our answer. Oliver reveals that Constantine is in hell. As in literal Hell. As in demons, devils, and plenty flames. I guess thats a pretty fair excuse when asking why Constantine hasnt been around to help out Team Arrow during their recent tussles with Damien Darhk and his magical powers.