I doubt Kosovo would enter - Russia hasn't recognised them as being independent. And since they're one of Serbia's friends (Serbia also doesn't recognise their independence), I doubt that will change soon. (There's also other countries - like the former Yugoslav and Soviet <except Estonia, Latvia and Lithuania> countries that don't recognise them either.)

well another one to join the Eastern bloc

 

and there's also Abkhazia, South Ossetia and Transnistria waiting in the wings :lol: