Not exactly sure what you meant by having to call the show "The Music Grandfather" if "Jackman plays the role" (have a feeling you didn't). For a grandfather (not sure his kids are old enough) he is still looking pretty damn good.
I wonder if Spielberg will keep the quasi-ballet movement in some of the dance sections or if those will be changed for more "manly" dancing. I am actually looking forward to see it but just wondering.