Fan Casting Ra's al Ghul in Zack Snyder's Trinity

Leader of the international syndicate called the League of Assassins. A genocidal terrorist with aims of wiping out most of human civilization and restoring Earth to an ecological paradise guided by his own sense of forceful justice. Ra's has a history with Batman, having been one of his many teachers as a young man. His daughter, Talia, even shared a brief but passionate romance with Bruce before differing ideals separated them. While he once saw Bruce as a potential apprentice and even a suitor for Talia, Ra's now regards him as a disappointment, and is determined to destroy him. The Ra's of this universe leans hard into the more ruthless, cruel and genocidal nature of the character from the source material. As cool and even likable as Ra's can be in, say, the Nolan films, let's not forget the Ra's of the actual comics was fine with such horrific historical crimes as the Holocaust so long as it whittled down the human population. Ra's is every bit as strong and skilled as Bruce Wayne, and his centuries' worth of experience makes him at times even more dangerous. Ra's is the chief mastermind of the force opposing Batman, Superman and Wonder Woman.