It wasn't merely that OBie suspected that this movie was lifted from his KING KONG VS. FRANKENSTEIN idea--it actually was lifted from his KING KONG VS. FRANKENSTEIN idea, though the lift was legal. A producer named John Beck either bought the idea from OBie or had an option on it. When he couldn't get any American studios interested in the project, he took it to Toho, and they chose to pit Kong vs. their own monster.

In the story outline I've seen, in KING KONG VS. FRANKENSTEIN, the super-sized Frankenstein monster was assembled in San Francisco, and somehow Kong reached the city by the bay, too. I saw drawings of Kong and the Monster riding down hills on cable cars, like kids on skateboards; the climax was to have been a boxing match atop one of the towers of the Golden Gate Bridge. OBie thought big and spectacular.