Especially after the 1922 Treaty of Rapallo https://en.wikipedia.org/wiki/Treaty_of_Rapallo_(1922) you would think that Poland and the Little Entente powers (Czechoslovakia, Yugoslavia, Romania) would get together. All these countries owed either their very existence (Poland, Yugoslavia, Czechoslovakia) or at least their territorial expansion (Romania) to the collapse of German (and therefore Austro-Hungarian) and Russian power in World War I. The prospect of Germany and Russia not only recovering but coming together should have stimulated unity if anything could.
(Incidentally, while we tend to think of Czechoslovakia as more pro-Soviet than the other Little Entente nations or Poland, this was really true only in the 1930's. "At the beginning of the existence of both states, their relation was bad. There was strong animosity sourcing from the armed conflict between Bolshevik authorities and Czechoslovak Legions and from the following participation of the Legions in the allied intervention against Bolsheviks. Moreover, Karel Kramář, Czechoslovak 1st Prime Minister, disliked the Bolshevik regime from personal reasons (his wife came from Russian nobility)." https://en.wikipedia.org/wiki/Czechoslovakia–Soviet_Union_relations
Is there any way the hoped-for (at least by France) prospect of Poland joining or at least cooperating with the Little Entente could come about? In retrospect, the Polish-Czechoslovak border disputes over Cieszyn/Těšín etc. (as well as other disagreements, such as Poland's dislike of Czechoslovak tolerance of Ukrainian nationalist exiles) should not have blinded Poland and Czechoslovakia (and the rest of the Little Entente) to their larger common interests.
(Incidentally, while we tend to think of Czechoslovakia as more pro-Soviet than the other Little Entente nations or Poland, this was really true only in the 1930's. "At the beginning of the existence of both states, their relation was bad. There was strong animosity sourcing from the armed conflict between Bolshevik authorities and Czechoslovak Legions and from the following participation of the Legions in the allied intervention against Bolsheviks. Moreover, Karel Kramář, Czechoslovak 1st Prime Minister, disliked the Bolshevik regime from personal reasons (his wife came from Russian nobility)." https://en.wikipedia.org/wiki/Czechoslovakia–Soviet_Union_relations
Is there any way the hoped-for (at least by France) prospect of Poland joining or at least cooperating with the Little Entente could come about? In retrospect, the Polish-Czechoslovak border disputes over Cieszyn/Těšín etc. (as well as other disagreements, such as Poland's dislike of Czechoslovak tolerance of Ukrainian nationalist exiles) should not have blinded Poland and Czechoslovakia (and the rest of the Little Entente) to their larger common interests.