This discussion may contain spoilers!
Many people say Kenny's dead because it's the perfect end to his character arc, and that his story is OVER.
I disagree, but this isn't a KENNY'S ALIVE or a KENNY'S DEAD thread, but I have a point. I think that the PERFECT end to Kenny's character arc would be that he got out of the alleyway/dark building, that he kept on fighting, that he never gave up, and even if he died later he got out of there because he kept on fighting, because he wanted to help the ones he cared about, and because he NEVER GAVE UP till the end.
That, in my opinion, would be the PERFECT end to Kenny's character arc, escaping, and not giving up, not just dying in the alleyway/building.