I'm bumping this up because I got an idea after reading the "Sick of movies being turned into musicals?" thread. How about Dick Tracy? It's such a fun, colorful film and it has five fabulous Sondheim songs in it already. It could easily be expanded by the right creative team though it would be better if Sondheim, himself, were involved.
"All our dreams can come true -- if we have the courage to pursue them." -- Walt Disney
We must have different Gods. My God said "do to others what you would have them do to you". Your God seems to have said "My Way or the Highway".