All the posters for Richard Lester‘s Juggernaut (’74) showed a large explosive gash in the hull of SS Britannic, a trans-Atlantic cruise ship. Which was accurate as far as the story went even if the film never showed any exterior shots of a damaged hull, much less any footage of the two hull explosions that happen during the film. The question is what other films have promised this or that element in ad materials (one-sheets, trailers, TV spots) without delivering de facto? There must be dozens of examples.