It will replace the Kinuyo Tanaka retrospective planned by former director Lili Hinstin.
Long-time Locarno Pro collaborator Duffner was announced on Monday as the new head of the industry programme.
Screen speaks to producers who have been through the industry platform.
Heritage Online connects rights holders of classics with online content platforms.
The festival hopes to run as a physical event in France from July 6-17, 2021.
Pablo Larrain-directed feature will begin shooting in Germany on January 28.
Screen talks to the Oscar-winning actress about working opposite acting legend Anthony Hopkins.
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