Continuity mistake: In the scene near the end where Ajax has a knife in the side of Deadpool's head and is punching him, later Deadpool pulls the knife out. In a follow up shot there is no hole in the mask where the knife was, but in a later shot the hole is there.
Deadpool (2016)
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Directed by: Tim Miller
Starring: Ryan Reynolds, T.J. Miller, Morena Baccarin, Gina Carano
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Wade Wilson: I had another Liam Neeson nightmare. I kidnapped his daughter and he just wasn't having it. They made three of those movies. At some point you have to wonder if he's just a bad parent.
Trivia: The joke that Deadpool makes "It's almost like the studio couldn't afford another X-man" is actually true. The movie had a relatively meagre budget of $58 million and the studio could not afford more X-men. The fight scene at the end in the junkyard also originally had Deadpool killing everyone with guns, but that was replaced with swords for budget reasons as well, which is why he accidentally leaves his bag of guns in the cab.
Answer: We don't see what happens to Angel Dust after Colossus carries her (and Negasonic Teenage Warhead) away from the collapsing Helicarrier. Both women were unconscious and we can only assume that Colossus put Angel Dust down somewhere before returning to Deadpool for the end scenes. Her fate beyond that - perhaps escape, incarceration or even recruitment - is unknown.