After the star-free PHANTOM's lukewarm embrace (that's kind) by movie audiences, they will surely want a star of Glenn's caliber to help tix to that one. (Liza--simply too bizarre a choice.) Arguably, it's a far less expensive than Phantom, since it has but two main locales, Norma's digs and the studio--easier to approximate than 9th century Paris.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling