Yes, you might be more integrated into the story than me as I haven't seen Split.
I like your review of Alita; it really was a very entertaining movie. I went in knowing neither that it's by James Cameron nor that it is based off a Japanese plot. My expectations were low as I thought it was an odd animation but came it very pleasantly surprised. It led me to my first-ever manga read as it's a very unique representation of special powers, humanity integrating into cyborgs, and the personal side of a person who possesses special powers and seeks to be human while having a robot's body.
I really hope it pulls in enough money for a sequel.