This image released by Warner Bros. Pictures shows Joaquin Phoenix in a scene from "Joker," in theaters on Oct. 4. Alarmed by violence depicted in a trailer for the upcoming movie “Joker,” some relatives of victims of the 2012 Aurora movie theater shooting asked distributor Warner Bros. on Tuesday to commit to gun control causes. Twelve people were killed in the suburban Denver theater during a midnight showing of the Batman film, “The Dark Knight Rises,” also distributed by Warner Bros. (Niko Tavernise/Warner Bros. Pictures via AP)
Joaquin Phoenix in a scene from 'Joker', which releases across the UAE from Thursday, October 3. Courtesy Warner Bros Pictures

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