Batman: He'll still be weak, between the nuke and so little sunlight. Just how weak we'll see when he finds my first surprise.
Robin: Yeah, but how long you expect to last against him?
Batman: Long enough.
Robin: Boss. I'm trying to get the plan here. I mean, you gonna die tonight or what?
Batman: Figure I will.
Bruce Wayne: What is it you want, Oliver?
Oliver Queen: A piece of him. The schoolboy. I always knew it would come down to the two of you someday. The world's not big enough for the both of you. Doesn't have to be a big piece. Just count me in, for old times' sake.
Batman: I didn't have to go easy on you. A different binding agent, a stronger mix... I want you to remember that. I wanted to remind you to stay out of my way. In all the years to come, in your most private moments, I want you to remember the one man who beat you.
Carrie Kelley: How do you fight someone like that?
Bruce Wayne: Simpler than I've made it. There's nothing wrong with Joker that I can't fix. With my hands.
Alfred Pennyworth: You're not even close to fully recovered.
Bruce Wayne: Neither is he.
Alfred Pennyworth: He doesn't need a walking hospital bed to keep his insides together.
Bruce Wayne: I know you're not looking forward to your part in this.
Alfred Pennyworth: I can't say it will be pleasant. But it does fall within my duties.
Answer: Typically, the Joker is immune to the toxin. It depends on the writer, and in this story, that would seem to be the case.
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