Seems like the DC Comics character of the Spectre is on the minds of several people at the moment. Personally I never really knew about him until his path intersected that of Hal Jordan (the Silver Age Green Lantern). In the issues from around that time that I’ve read the character shifts from one who seeks to punish/exact vengeance to one who seeks redemption for others. At some point I’d like to get hold of a huge set of back issues and have a look at how he functions (theologically) in the DC universe (where the Spectre exists as the embodiment of the Wrath of God).
More information on the character at Spectre (comics) – Wikipedia
Much of the Spectre’s modern character was defined by the theologically trained John Ostrander and he developed the distinction between the pursuit of vengeance and that of of revenge using the character. A distinction that resonates with how we encounter the concept of vengeance (naqam) (esp. God’s) in the Psalms.