I have just though they do not really do musicals based on plays anymore. The ones I can think off are she loves me ,Oklahoma, spring awakening,Sweeney Todd and lots of other shows but non very recently. What play do you think could make a good musical?
Wallace - or even Wallace!. The story of Edward and Mrs Simpson. It's got the lot, illicit love, family feuds, revenge and a big finish with the abdication of the King and our current Queen being propelled into a life of duty. Not to mention all those fab 30's fashions.
There was a short-lived musical about them! It was called "Always"... which is all I remember as it's been some years, but I know it existed in the West End for a bit.
One thing I've always wanted to see on stage was "The Last Unicorn". There was an "okayish" version in Germany some years ago, but I'm sure it could be done so much better. Ignore the animated movie (which had its own lovely soundtrack) and go back to the original novel by Peter S. Beagle - it sings so much, the musical is practically leaping off the pages.
Otherwise I'd suggest a browse through the website rejectedprincesses.com - so many fantastic tales about fantastic women throughout the centuries that would make for great musicals with strong female leads from all over the world. I'd definitely love to see a decent stage version of Grania O'Malley's life to finally banish the bad taste of Boublil/Schoenbergs godawful sexist nonsense from my memory.
The Last Unicorn...lovely.
I'd love someone to have a crack at 'The Secret History' by Donna Tartt. I think it could be incredible.