User blog comment:ShodaiMeestonLarva/Godzilla films that needs to be deleted/@comment-24561652-20150321190301/@comment-26969523-20150322031350

In 1966, Toho planned to produce "Operation Robinson Crusoe: King Kong vs. Ebirah" as a co-production with Rankin/Bass Productions however, Ishirō Honda was unavailable at the time to direct the film and Rankin/Bass backed out of the project, along with the King Kong license.

-Source: https://en.wikipedia.org/wiki/King_Kong