I hope this hasn't been mentioned before. But ... how about a ballet based on Virginia Woolf's strange, rather surrealistic novel, Orlando? The title role requires someone who can dance as a man(boy) and also as a woman, in the course of a single work.
My thought was that this could be danced on one evening by a woman (Tilda Swinton performed the part in the film) and on the next evening by a man.
Something like this would seem to be right up the alley of the Paris Opera Ballet (home of such works as Caligula, Clavigo, and the Proust ballet, les Intermittences du Coeur.
P.S. This came up in another thread devoted to the Trocks, but I thought it might be intresting to repeat it here.
Interesting as usual Bart. Glad to see you still fighting the good fight! I am also gratified to see how the idea of "appropriate" topics for a contemporary story ballet has also been freed up from where it was stuck a few years ago