Spectre (2015 film):

The ownership of the Spectre organisation—originally stylised "SPECTRE" as an acronym of SPecial Executive for Counter-intelligence, Terrorism, Revenge and Extortion—and its characters, had been at the centre of long-standing litigation starting in 1961 between Ian Fleming and Kevin McClory over the film rights to the novel Thunderball. The dispute began after Fleming incorporated elements of an undeveloped film script written by McClory and screenwriter Jack Whittingham—including characters and plot points—into Thunderball, which McClory contested in court, claiming ownership over elements of the novel. In 1963, Fleming settled out of court with McClory, in an agreement which awarded McClory the film rights. This enabled him to become a producer for the 1965 film Thunderball—with Albert R. Broccoli and Harry Saltzman as executive producers—and the non-Eon film Never Say Never Again, an updated remake of Thunderball, in 1983.[N 3] A second remake, entitled Warhead 2000 A.D., was planned for production and release in the 1990s before being abandoned. Under the terms of the 1963 settlement, the literary rights stayed with Fleming, allowing the Spectre organisation and associated characters to continue appearing in print.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Who incorporated elements of an undeveloped film script written by Saltzman into Thuderball?
unanswerable