Is Superman Immune to Joker Toxin? Is Superman immune to Joker Toxin? Well yes and no. The answer is yes because Superman really didn't fully succumb to the toxin on account of being human like Batman did in the Batman Who Laughs, which by the way is probably my favorite comic of all time due to just how much of an allure the book is. With this being said Superman is definitely vulnerable to it, and the Batman who laughs tried [...]