Deadpool is one of Marvel's most popular anti-heroes, and his origin as told in his first solo movie is remarkably close to his comic book backstory. But there's more to the formation of Wade Wilson's, let's just say... specific personality than just his part in the experiments that turned him into a deadly, nigh-unkillable mercenary.
Deadpool is known as the 'Merc with a Mouth,' a sobriquet he's earned many times over, but it took a while for Wade Wilson to evolve from a quippy assassin in his original appearances by creators Rob Liefeld and Fabian Nicieza to a full-on fourth wall breaking, self-aware comic book character who knows he's fictional.
