Totally agree with the exception of Haggar none of those characters fits into the main SF series. If it was something like the marvel vs capcom games of before I wouldn't see a problem with any of them although predator would still not fit
“When I was 5 years old, my mom always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down “happy.” They told me I didn’t understand the assignment and I told them they didn’t understand life." - author unknown