"But I especially don't see why Sunset wouldn't be an event as a TV movie."
I agree. I think there are good reasons why SUNSET BLVD. won't and probably shouldn't be made as a big-screen movie musical, but with the right casting, I think it would be a good choice for a TV presentation, whether live or not (preferably not). To clarify, I personally am NOT a fan of the show, but I think it would draw a large TV audience if it was was well done and cast with a star or two.