Not only that, but in the movie when Hans tells everyone that Anna was dead but they had time to say their vows they seemed to accept his claim without question

Not only that, but in the movie when Hans tells everyone that Anna was dead but they had time to say their vows they seemed to accept his claim without questioning right of succession. The troll theory presented is pretty fun, and after 100+ viewings I'm all for new ways of looking at the movie, but building it off a real-world fact that is barely relevant and easily explained away is tenuous.