"How they resolve it is, in the beginning, they will show it on the big screen, we're talking about big venues where it would play, where it should play, and what happens after that I'm not sure," De Niro said on the sidelines of Marrakech Film Festival.
"'The Irishman' is a risky film. No one else wanted to fund the pic for five to seven years. And of course we're all getting older. Netflix took the risk," he said.
The production began on the mob drama in 2016 and Netflix later acquired worldwide rights to the film.
Hoffa was an American labour union leader and author who served as the President of the International Brotherhood of Teamsters (IBT) union from 1958 until 1971. He vanished in July 1975 outside a Detroit restaurant and was declared legally dead in 1982 after never being seen again.
The film's release date has been pushed back to the second half of 2019.
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