Can Cubans get back what was stolen from them by suing Cuba in the USA using the Foreign Sovereign Immunities Act?

I went to see "Woman in Gold". It is an excellent film about how a Jewish woman, Maria Altmann manages to get back the "Portrait of Adele Bloch-Baauer” that depicts her aunt and that was painted by Gustaf Klimt. Sixty years ago that portrait and other painting in her family’s possession were seized by the Nazis.

Altmann is able to sue Austria after achieving that the Supreme Court in the USA 2004 decides that the "Foreign Sovereign Immunities Act" enacted in 1976, could be applied retroactively.

Leaving the film, I asked myself... could Cubans (and other brethren) recover what was expropriated / stolen from them by accessing this law?

Might Cubans want to contact E. Randol Schoenberg