"We're hoping the Cobain film, that'll hopefully be released in 2014, will be this generation's The Wall - a mix of animation and live action that'll allow the audience to experience Kurt in a way they never have before. It's very ambitious."
The director recently spoke out to deny reports that he was collaborating on the project with Cobain's combative widow, Hole star Courtney Love.
The New York Post quoted Morgen as saying in November, "Courtney is the one that brought me into this... We've been trying to find the right time to put this film together and the time is now."
He added: "Kurt was not only an amazing songwriter and musician, he was an incredible artist and filmmaker. So we are going to do the movie sort of like a third-person autobiography - [as] if Kurt was around and making a film about his life."
Love's rep later issued a statement to ew.com, confirming that while the singer is not involved in the creation of the film, she's "very happy" Morgen is behind it.
"She thinks he's a great director," the rep said.
Morgen also told ew.com that his comments in the Post were taken out of context.
"Back in 2007, I had a meeting in L.A. with Courtney Love to discuss my possible involvement in a Kurt Cobain documentary," he said.
"She had seen my film, The Kid Stays in the Picture, and thought that I had the right vision and passion to bring Kurt's story to life. Since that time, I have been speaking exclusively with Kurt Cobain's estate, who have given me their full cooperation in order to make the film. Courtney isn't currently involved with the project in any capacity.
"The estate and I will be releasing more information about our plans in the coming weeks. Production on the film will begin in the coming months and we are aiming for a 2014 release."
Love, who reportedly lost the rights to Cobain's image last year, also recently put the kibosh on rumours that there are plans for a Broadway musical based around Nirvana's music.
"There will be no musical," she told The Observer.
"Sometimes it's best just to leave things alone."
Cobain was 27 when he took his own life, on 5 April 1994.
FAST GOSSIP
And finally...
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* "He's my best friend" - Courteney Cox talks soon-to-be ex-husband David Arquette.
* Marriage, followed by carriage? Crystal Harris "desperate" for babies with Hugh Hefner, according to tabloid tattle.
* Mariah Carey's first husband takes credit for her success in new book.
* Liam Neeson says society is way too sexy for him.
* Why cops rushed to Brad Pitt and Angelina Jolie's Hollywood Hills mansion.
* Orlando Bloom and Miranda Kerr crush split rumours with a public kiss.
* Heidi Klum says she'll (probably) never marry again.
* Charlie Sheen whisks new porn star lover off to Mexico.
* Taylor Swift's dad warns Harry Styles not to break her heart? Cobblers.
* Kim Kardashian and Kanye West turn down $3m for baby pics?
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