Complex sentence: In the late' Nineties, he worked with many of the top Disney animators as a writer of several unproduced Disney animated film projects and wrote the teleplay for a Disney live action musical for the American Broadcasting Company, yet to be produced.
Split into simpler sentences: In the late' Nineties, he worked with some of the great Disney animators as a writer of several unproduced Disney animated film projects. He also and wrote the teleplay for a Disney live action musical for the American Broadcasting Company, yet to be produced.