It’s been called the biggest twist in motion picture history. It was known by no one on the set when they filmed the scene, except for Mark Hamill, who was told by George Lucas only moments before they filmed. The true fate of the father of Luke Skywalker.
This is something that I think could be retained if the prequels were ever rebooted. As one person recently said at Comic-Con, how could anyone take that twist away from future audiences? With the creation of Episodes I-III, it was very clear that the secret wouldn’t be able to be maintained. Especially with the obvious nature of the direction of the story.
My thoughts on possible solutions?