Fan Casting Arthur Fleck in Justice League: Apocalypse

During the film, Bruce is exploring Wayne Manor, since it's one of the few buildings that remained intact after Darkseid's takeover, and Selina enters the living room and asks him what it's like to be Batman, to undergo all these physical and emotional beatings. Bruce replies by saying, "It's like you can't let go of hatred. It's like reality slips away and all you see is death." and as he says this, he not only begins to think of what became of his parents in the Flashpoint timeline, but also his dead girlfriend Rose Wilson and the first Joker, Arthur Fleck, who has been dead for quite some time at this point in time.