Deadpool is a character that could have been left to languish in limbo if his original on-screen debut in X-Men Origins: Wolverine had been his only appearance. However, back in 2014, something happened that changed all that when test footage featuring a very different take on the Merc with a Mouth was leaked online and led to a wave of outcry over why this version of the foul-mouthed Marvel anti-hero was not being greenlit straight away. For those who still hold any doubt over whom the source of that leak was, Ryan Reynolds was happy to confess all while appearing at the Toronto International Film Festival.

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