No one is going to give up their current borders to form Yugoslavia 2.0.
No, for sure. Yugoslavia was country that was from the start controlled by western Europeans and Vatican. Foreigners double-crossed Serbians and seized control over elements of internal antagonisms and main protagonists. When the moment came, they triggered their satellites, ruined Yugoslavia, harmed Serbians and dearly weakened Slavic South.
If we ever, or rather when, we form Intermarium, we should make sure that we rule ourselves. Not just to live in fantasy.