From the first season of Justice League Unlimited - finale, with Terry McGuiness, the future Batman, confronting an aged Amanda Waller, who recounts this story about Ace of the Royal Flush Gang and Bruce's Batman.
Marvel! DC! read all about it!!! 6 year of superhero movie madness. This'll definitely keep me going for a while on the hero front!!!! I'm so excited!!! Every superhero movie through From Avengers to Justice League | BGR