This is a comic series.
Issue 1[]
A serial killer named Hog gets mutated by Joker, but it results in tragedy.
Issue 2[]
Black Mask unleashes Hog on Nightwing.
Issue 3[]
Prometheus attacks Batman for revenge, but Joker interupts it.
Final Issue[]
Prometheus gets murdered by Joker, but Hog is loose so to save Gotham Batman & The Clown Prince of Crime must team up (the tragedy!) to save the city.