I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable".  Plot title: Justice League: Crisis on Two Earths Movie plot: The movie begins in an alternate universe where Lex Luthor and a heroic analogue to the Joker named the Jester are stealing a device from Crime Syndicate headquarters. After securing the "Quantum Trigger," Luthor and the Jester attempt to escape, but an alarm makes them realise the Syndicate are approaching. The Jester sacrifices himself with a bomb to allow Luthor a chance to get away, killing J'edd J'arkus (the Martian Manhunter's opposite) and Angelique (Hawkgirl's counterpart) who has just stabbed him with her flaming sword, in the process. Lex Luthor is confronted by the remaining Syndicate members, only to activate his dimensional travel device and escape to the Earth of the heroic Justice League, they are delayed thinking his device is a weapon. Once there, he turns himself over to the police, who he knows will think he's the evil Luthor from this world and thereby summon the Justice League. Superman's x-ray vision confirms Lex Luthor's reversed organs mean that he's from a parallel Earth, and that "their" Lex Luthor is still in the Stryker's Island prison, so the League agrees to hear Lex out. Lex tells his story and asks the League for help: his Earth is being extorted by the Syndicate, who have taken control of all of Earth and systematically eliminated Luthor's Justice League members. The only thing holding them in check is the threat of a nuclear response. While waiting outside the League's meeting room, he hides the Quantum Trigger. All members of the League agree, except for Batman, who argues that the League is spread too thin for the problems of their own world, let alone Luthor's. Luthor transports the remaining members of the League to his universe, while Batman stays behind to finish building the Watchtower. Arriving at Justice League headquarters on Lex's parallel Earth, they find the Syndicate and must soon retreat. Regrouping at Jester's base, they make plans to attack Syndicate targets, and they even capture Ultraman, the villainous counterpart to Superman. However, United States... My question: who does the league battle?

the Syndicate