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Instead of Qui Gon dying in the first film Lucas has him die in the last and that is what changes Anakin from being a Jedi to being a Sith Lord named Darth Vader. He somehow blames the Jedi for the death. The first film is as OTL except he beats Maul. The second is still the Clone Wars and in the third you have the death of Qui Gon and the change to Vader. How would you make those changes?