A musical based on the songs of the Bee Gees is being written for London's West End and Broadway.
Robin Gibb said the project was already in the pipeline and could be on stage in the next 12-16 months.
He made the announcement as he unveiled a green plaque in central London honouring the group's achievements.
The tribute at 67 Brook Street in Mayfair is where the band wrote hits including Diana Ross's Chain Reaction and Dione Warwick's Heartbreaker.
Barry, Robin and Maurice Gibb were one of the biggest acts of the 1970s and won multiple Grammy Awards during their career.
Gibb unveiled the plaque on the facade of the former home of the band's manager and producer Robert Stigwood.
It was where the trio spent much of their time rehearsing and composing songs between 1968 and 1980.
Gibb said it was also where they first met actor John Travolta for the making of the film Saturday Night Fever.
At Saturday's unveiling Gibb said: "It's very special and more so because of losing Maurice in 2003 my twin brother.
"It's an honour to him because he is no longer with us and because it is bringing up memories.
"It used to be a hub for meeting up and writing."
The tribute is the latest in a long line of green plaques celebrating the achievements of some of Westminster's most famous former residents, including Oscar Wilde, TS Eliot and Jane Austen.
To date, 77 plaques have been erected by Westminster Council to commemorate buildings in the city associated with people who have made lasting contributions to society.