My dumb little headcanon (that probably was voiced out before) is that Scarecrow's immune to the Joker Venom and Joker's immune to the Fear Toxin because they're immune to their own formulas and somehow their formulas are pretty similar physiologically. And imagine they're confronted once and it's just getting awkward. Like, Crane's sitting tied to a chair while Joker's waiting for his venom starting effecting Scarecrow and they're just staring at each other. Like,
Joker: So... do you feel funny?
Scarecrow, no muscles moving behind the bag mask: Define 'funny'.
Silence
Scarecrow, slightly annoyed with literally nothing happening when he had plans for that evening (to poison Gotham obviously): let's put the definition aside. *The Therapy Mode turned on* Could you tell me what do you feel? Anxiety? Fear? Terror?
Joker: Hungry.
Scarecrow, who managed to inject the Fear Toxin into Joker's butt before getting caught and tied to a chair: Hungry?
Joker: Well yea, I'm hungry, I missed dinner chasing your raggedy ass!
Awkward silence
Scarecrow: Meaning... Pizza?
And yes, Joker's ordering pizza, untying Scarecrow, and they're chatting, like, they'll never be besties etc but that's an occasion that will be pretended to have never happened because literally whata shame, they both got caught and they both failed to poison an opponent.
Joker: Nah, not a fan of syringes, they require to be precise and patient, I can't afford to be like that when that's a lot to do and a mass effect that's needed. Ventilation, though...
Scarecrow: You're literally missing the point! The most thrilling part's figuring out what's inside each particular individual.
Joker: Guts and shit?
Scarecrow: Doubts and inner demons.
















