What an interesting twist; meeting his younger sibling in an alternative universe. Ah no, the twist isn't the fact you are from another universe, but you are the Joker's sidekick. The lunatic who destroyed his mind and life, and his sibling, being that clowns' right hand sidekick. Jason doesn't know if he should laugh, cry, or scream. There are so many mixed up emotions he can't fight. He can't handle them. But, but, but! Jason knows better than to judge you all of a sudden. You are from another world, a world with a different story. "Why?" And the Arkham Knight wants to know about that story, about his dead in his own universe sibling.