Nope. Slavic nations generally dislike each other and the relationship among them are from outright hostile [like Serbs and Croats], to dislike [Czech, Poles and Russia], to indifference [Czech and Poles, or Czech and Slovaks]. There is no desire for any of the Slavic countries to ever come together after failure of the 19th century panslavism to communist lead international friendship. Each country has own language, history, tradition, social and political structure that predate panslavic awakening, and the association with these tradition is stronger than interest in other Slavic countries. Not to mention that there are huge differences in economies and politics. Slovenia and Czech Republic are rather wealthy, Ukraine is poor, and Slovakia and Poland are working on improving their status. Secondary, the Czech Republic is extremely socially liberal with very strong secular culture going back to medieval ear, where gay rights, environmental issues and so on are aligned with the most liberal countries in Europe and it is more liberal than Germany or Austria. On the other hand you have traditionally Catholic Poland and Slovakia, where church is still defining element in everyday life, while Ukraine and Belarus are totalitarian state looking upon Moscow as their solution. Slovenians are the least kind to any Eastern European nations, they generally dislike anyone, they do not like Czechs or Slovaks, and consider themselves as the superior Slavic nation.
For present day Central European Slavs, the EU is still the best option and they are more closely historically associated with the West as they were before communist takeover. The well being of their economies and population takes precedent over any cooperation that would lead to the Slavic superstate.