The concept is a little puzzling because nine of the eleven countries have single country funds, I know that one of the providers has filed for a Czech Republic fund and I think that same provider (the name escapes at the moment) also filed for a Hungary fund too.
The title of the article is Investors Miss Out... which is not the case here at all. It requires a willingness to go to the country level in order to get the effect the author thinks people are missing out on. I left a comment on the post noting that there were funds already for most of the countries and the author was kind enough to reply noting that given the demand he is surprised there is no single fund for group of 11.
Maybe there will be a fund but I think many (not all) investors would be far better off do the extra work required to own individual countries (or narrower) and don't forget this process can focus more effort on what to exclude than what to own. The last ten years or so offered at the very least, normal returns for people lucky enough to avoid (or underweight) the right countries and sectors.