sentences:  On October 20, 2006, Darkhorizons.com reported "Henson's company has hired executive producer Ahmet Zappa ("The Monstrous Memoirs of a Mighty McFearless") to write a treatment for the film which will be a full-length live-action musical fantasy starring the underground dwellers who venture out into the human world.Henson Co. co-topper Lisa Henson is producing, whilst Brian Henson will exec produce.