Says Deadline, "I’m told that Zemeckis is in early talks with his co-writer Bob Gale and the film’s composer Alan Silvestri to explore a stage transfer. A stage musical would be an intriguing way to reintroduce a franchise which, over three films, grossed nearly $1 billion worldwide. Zemeckis’ ImageMovers would be involved if this goes forward."
One would imagine that this is where the Writer's Guild Separation of Rights Clause kicks in, which gives the writers of a movie screenplay the ability to produce a stage version even though a movie studio owns the film rights. Despite this, it isn't hard to believe that "the bobs" would want to work with Universal so that many of the familiar trappings of the film could be incorporated into the stage show.