TB, like so many at the time, Michael may have thought that Castro could be manipulated or overthrown. However, FFC probably had no room in the script for more Cuba.
Interesting question. There is so many things that were left unanswered....that's not a criticism but it would have been interesting to see if he was really done with Cuba and also what happened to the Corleone crime family after 1959-60. Also what exactly became of the Rosato Brothers. We know they were on the run BUT knowing how ruthless Mike was its hard to imagine they would stay alive
