Domino is one of Marvel's luckiest heroes, but even the Deadpool antihero has one of the most surprising weaknesses in Marvel Comics: She's deathly afraid of chickens. In a 2009 comic book, Domino reveals her unexpected fear of the domesticated bird. Her unguessable weakness is so unlikely that it needs to appear in the MCU as viewers, as it's so out of the left-field it would work well alongside the funnier tone of future Deadpool films.
Domino gained her powers of altering probability after being experimented on in a top-secret government program that tried to create the perfect weapon. The program wasn't considered a success, and after getting broken free from the facility, she began her life as a mercenary, which would put her on a direct path with Deadpool. Her luck powers have come in handy many times, including in her live-action appearance in Deadpool 2, where she was the only new X-Force member to survive their hilariously short debut mission. However, despite her luck powers, Domino does have a considerable weakness Deadpool exploits: chickens.
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In Deadpool #17 by Daniel Way, Paco Medina, Juan Vlasco, Marte Gracia, and VC's Joe Sabino, the Merc with a Mouth is granted membership in the X-Men, but he immediately proves to take his new role too seriously. After Deadpool makes it clear he wants to kill one of the group's public enemies, the X-Men task Domino with stopping him. When Domino finally catches up with Wade Wilson and ties him to a bed, she later helps him escape. Deadpool demands to know her biggest fear, and she responds with «chickens» but refuses to tell him why. After joining Wolverine in finding Deadpool (as he threatens to
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