O here we go again - "Million-Dollar Quartet"

I always get pegged as a tough critic, a nay-sayer, what-have-you, but I cannot help but be a bit concerned about this trend in musical theatre. The regurgitated song cycle. A new musical is making news in the New York Times, as well as regionally, Washington and Chicago specifically, "Million Dollar Quartet." It is based on a historic, almost mythical jam session, between Elvis, Jerry Lee Lewis, Johnny Cash and Carl Perkins, with a score that includes "Blue Suede Shoes" among many others of the period's blue chip rock and role. The Times is expecting "Million-Dollar Quartet" to do very well, and likely make its way to Broadway, a speculation made all the more likely with a New York Times puff piece under its belt.
Here is what concerns me. On Wednesday Justin and I went to see Jersey Boys. Despite the SNOW and reoccurring sound problems we enjoyed ourselves. But after we left the theatre I said to Justin, "in all honesty that was not better than "The Drowsy Chaperone". You may recall that Jersey Boys beat out "The Drowsy Chaperone" to win the Tony for best new musical in 2006. I mean sure the music was great and I was totally into it. And I can see how with a stellar cast "Jersey Boys" would explode off the stage, but where is the creativity in stitching a musical together from period hits.
Now I love "Mamma Mia!" just as much as the next musical geek, but the difference is that ABBA wrote musicals, and most of their music was so theatrical in intention, that it seems more appropriate. I have also been guilty of suggesting, albeit late one night, that the Carpenters story and songs would make an awesome musical. So I don't want to rule it out completely, it just concerns me that creativity is dying.
Look at the most successful shows in New York in the last few years, many have been film-to-stage adaptions and revivals. And Toronto is even worse, the biggest hits here this year were "We Will Rock You" and "Dirty Dancing", both awful - in terms of writing, development, and even basic character evolution. And "Jersey Boys," which I overheard an usher say, will likely have a second extension beyond the February extension announced when the show opened. That is good for the city and for performers working here, since it will continue with a local cast. But why is it that people wont come out for multiple extensions of "The Drowsy Chaperone"? A show that was born here, and was brought back to Toronto with the original Man in the Chair, Bob Martin, in tow. It baffles me. Anyway we will have to wait and see about "Million-Dollar Quartet." (image from the New York Times.)