Trivia: On the scrolling text during the news broadcast it says "Notorious bank robbers Westervelt and Ghizas arrested Sunday evening after high speed chase." Dirk Westervelt was the film editor for "Deadpool 2." He also was an editor for "Logan." Nick Ghizas was the visual effects manager for "Deadpool 2." He was also a visual effects artist for the TV show "Agents of S.H.I.E.L.D." Westervelt was also an editor for the film "Notorious" and "Faster."
Trivia: At the start of the scene where Deadpool and Weasel are recruiting the X-Force, they are looking at photographs of the applicants. The first photo shown is of Ruth Bader Ginsburg, an Associate Justice of the Supreme Court. A closer look at the photo will show that her superhero name is Notorious R.B.G. (00:53:55)
Trivia: Director David Leitch has a cameo as "Ground Chuck Mutant", one of the mutant prisoners taken on a truck to a new location.
Trivia: When Deadpool retrieves the cocaine from Blind Al's apartment, the bags of coke are sitting next to another object labeled "The Cure for Blindness." This is a bit of a callback to the first film, in which Deadpool facetiously told Al that he had cocaine stashed somewhere in the apartment next to "the cure for blindness." Evidently, he literally did have a cure for blindness.
Trivia: It was revealed after the film was released that Ryan Reynolds himself was the voice of Juggernaut, in addition to portraying the facial motion-capturing work for the digital model. They simply deepened his voice in post-production. In the credits, the voice of Juggernaut is listed as "himself".
Trivia: Scrolling text on a news program in the film jokingly states that Christopher Plummer refused a role in the film. This is a dual reference to Plummer replacing Kevin Spacey in the film "All the Money in the World" after Spacey was accused of sexual misconduct, as well as TJ Miller also being accused of sexual misconduct prior to this film's release, which led to some people demanding that Miller be removed from the final film.
Trivia: A promotional poster for the PG-13 version of this film (Once Upon a Deadpool) was released as a parody of a painting commissioned by the LDS church called "The Second Coming." This was reportedly done in response to the state of Utah - known for the LDS church having unconstitutional influence over its state laws - fining a theater that served alcohol for showing the first film, alleging that it violated state liquor laws by serving alcohol while showing nudity or simulated sex.
Trivia: As with the first film, Reynolds' face being covered meant if he thought of funnier lines after filming was wrapped it was comparatively easy to record new ones and replace the originals.
Trivia: Deadpool lands on a Hillside amusement park sign when parachuting. Ryan Reynolds got his start on the Canadian TV show "Hillside."
Answer: His change of heart came from Deadpool's sacrifice. In the second timeline, Cable saves Deadpool, but Deadpool had no way of knowing. Firefist still has a change of heart because Deadpool was willing to sacrifice himself, even though he was ultimately saved by someone else.
Now, I can accept that in theory, except that Russell repeatedly saw Deadpool putting his ass on the line to rescue Russell. I mean, Russell knew from the very beginning that Deadpool could have killed him (but chose not to) and took some severe ass-beatings on Russell's behalf. Russell was really, really hard-boiled, and I'm not seeing that Deadpool almost getting killed as enough impetus to change Russell's heart. It seems (to me, anyway) it was Deadpool's actual death that changed Russell, such that a mere deflected bullet would not have the same effect.
Charles Austin Miller
Deadpool often mentioned "lazy writing" and Russell having such a change of heart might be an example of it.
Erik M.
Deadpool saving Russell in the film is what made Russell think that they were friends. When Deadpool tells Russell that they aren't friends, he remains hostile toward Deadpool, not believing him when he later admits to caring for Russell. At this point Russell is too far gone and will kill. However, it's only when Deadpool takes a bullet for Russell, fully intending to die in both timelines, that Russell sees that Deadpool really does care about him, and would have died to save him.