What chance does CANZUK have?

Ok, so I was reading this article about what CANZUK is, who supports it etc. The writer of the article seems really optimistic about CANZUK and believes that within a matter of years, CANZUK will be a reality. I have also read many other articles on CANZUK and they don't seem as optimistic, even the RationalWiki article on CANZUK seems rather skeptical of the idea. What does everyone else think?