Batman/Spider-Man: World's Finest

Batman
Kevin Conroy as Bruce Wayne / Batman Mathew Valencia as Tim Drake / Robin Tara Strong as Barbara Gordon / Oracle Scott Menville as Dick Grayson / Nightwing Efrem Zimbalist, Jr. as Alfred Pennyworth Bob Hastings as Commissioner James Gordon Jensen Ackles as Jason Todd / Red Hood Mark Hamill as The Joker Arleen Sorkin as Dr. Harleen Quinzel / Harley Quinn Jason Isaacs as Ra's al Ghul Wade Williams as Roman Sionis / Black Mask Ron Perlman as Slade Wilson/Deathstroke Kevin Spacey as Floyd Lawson/Deadshot