Batman: Legends of the Dark Knight #144 (DC, 2001 — Cover A)

Thanks to Ra's al Ghul, the Joker is about to put his master plan into action: the release of a Joker-gas bomb that will decimate the entire planet. Of course, Batman will eventually stop the two -- but that's only if Joker and Ra's don't kill each other first! 'The Demon Laughs' part 3.