Official Ronnie James Dio documentary is set to be released this year. It is the first documentary about the legendary singer to be fully authorized by the artist's estate. BMG is both financier and executive producer of the film.

Wendy Dio spoke to journalist  Lucas Gordon and said: "It's coming out [later this] year. I [recently] saw the first cut of it. It was very emotional. It's very different from [Dio's autobiography]. 'Cause the book finishes in 1986, with Ronnie playing Madison Square Garden. But the documentary goes all the way through his life till the end. And it was very emotional. I was watching it with my publicist and a person from BMG, who are funding the documentary. And we all cried. It was very emotional. But it's really interesting and really good. Rob Halford is great in it, talking about stories. Lita Ford [and] Jack Black [are also in it]. Eddie Trunk [SiriusXM radio personality] and Mick Wall [author of Dio's autobiography] both kind of narrated it and everything. I'm very pleased with it. I don't know exactly when it's gonna come out [this] year, but it'll be out [this] year."

Notice that Ronnie James Dio's autobiography, titled "Rainbow In The Dark: The Autobiography", was released last July 2021.