One other curious detail concerning OCTOPUSSY, an early treatment - around early summer of 1959 - by Ernest Cuneo for the then-still-untitled "Xanadu" Bond project had the following storyline:
A Soviet agent penetrates the USO (United Service Organisation, an armed forces entertainment operation to boost morale among Allied troops around the world) with a plan to detonate a nuclear weapon on an American base. Bond is sent undercover as a British entertainer to investigate and prevent the worst. He was to be aided by CIA agent Felix Leiter and real-life actors such as Noel Coward and Laurence Olivier. Bond was to appear on stage himself and having difficulty finding a suitable act.
Now if this isn't heavily reminiscent of what OCTOPUSSY depicted almost 25 years later. Especially interesting since just at that time the remake of THUNDERBALL was under way.