Thanks for the kind words! Honestly, this really is more of a Batman story than any other DC line, but by including mentions of the Green Lantern Corps, it showcases how something like the GXP can work alongside it (though Hal Jordan will appear in Chapter 19). Mainly, the first half of the story follows the Final Crisis storyline (or of you read purely Batman issues 701-702) and then will cross into Grant Morrison’s Batman and Robin book (mainly Batman vs. Robin, Batman and Robin Must Die, and Return of Bruce Wayne). I do try to add touches here and there of DC continuity so be on the look out!
As for choosing Universe, I did OAV in my Harry Potter story so I wanted to try writing Kiyone, who fits better in this pre-established universe. Gotta love her kiyonesmile1
