Rian Johnson recently clarified that his announced Star Wars trilogy never progressed beyond conceptual discussions with Lucasfilm and was largely a placeholder announcement. While he remains open to the possibility of returning to the Star Wars universe, he is currently focused on his own projects, such as the Knives Out series.
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Rian Johnson, the director of The Last Jedi, shared that while he once planned a Star Wars trilogy, it never went beyond early ideas and he is currently focused on making other films like Knives Out.