During an early scene in the 1989 film, Dead Poets Society, Keating (played by Robin Williams) sets the tone for the rest of the movie when he asks his students to read the introduction to their poetry textbook.
The tone and plethora of unanswered questions (again, is the Joker really dead and how does that work?) may prevent this issue from being as solid as the rest, but the fact that it makes me want to see more of Harley and Green Arrow speaks volumes for it.