The World's Strangest blog has more:
4. Hamlet, starring Cary GrantSounds rather like the Kurosawa or the Kaurismaki.
In the late 1940s, Hitchcock hit on an odd idea: he wanted to produce a modernized version of Hamlet set in England with Cary Grant in the title role. According to Hitchcock, the project “would be presented as a psychological melodrama.” The idea hit the rocks after Hitchcock’s studio, Transatlantic, announced the project and a professor who had written a modernized version of Shakespeare’s tale threatened a lawsuit.