The Most Controversial Batman Movie Batman The Killing Joke 4.0 Very Good (7). 4.5 Very Good+ (10). 9.6 Near Mint+ (258). The item Batman The Killing Joke (1988, DC) CGC Signature Series 9.8 is in sale since Saturday, September 29, 2018. 4.5 Very Good+ (10). The item Batman The Killing Joke (1988, DC) CGC Signature Series 9.8 is in sale since Saturday, September 29, 2018.