"In the original script the action in the third act was great, but it was just Deadpool and a lot of guns. One of my notes early on was that I wanted to see more superhero stuff. We had Garrison Kane in there for a while, but in the final round of budget cuts we had to take him out, because he was a pretty expensive dude. He’s got these bionic arms that change shape; he would have been a visual effect for a large part of the movie. And as it turned out, a visual effect too far. I went through the list of Marvel characters and picked a few others I thought could be visually spectacular and fun.
And at the end of that list was Negasonic, which I just thought was a freaky, funny name. And I sent this list over to the writers, Rhett (Reese) and Paul (Wernick), and they were like, 'Oh my ******* god, we have to use her!' So that’s how she ended up in the movie. Her name was cool, and we kind of wanted a straight-man to play against Colossus. We thought about Cannonball, but he would’ve been a stupid hick character, whereas the guys wrote Negasonic as this deadpan goth teen, which was a great angle. She turned out really well. There aren’t really many definitive Deadpool villains, apart from Cable. If we don’t put Cable in Deadpool 2 I think we’ll be run out of town on a rail.”
