The last decade prior to "contemporary" musical theatre; part of the "pre-contemporary" period of musicals.
Many big names in musical theatre still writing: Andrew Lloyd Webber, William Finn, Stephen Sondheim, Alan Menken, etc.
Disney opened their first Broadway show with Beauty and the Beast and brought in a new audience: families with children. It was a smash hit.
Disney's presence in the theatre industry gave way to the corporate musical: a show built, produced, and managed by multi-functional entertainment corporations. It may begin as the idea of a composer or writer, but is sponsored and controlled by the corporation.