Dancers, Ogres & Horses

Do you prefer your singing underdogs prepubescent and British or flatulent and green? Either way, the fall season should have something for you. “Billy Elliot” (opening November 13) garnered ecstatic reviews in London in 2005; Elton John has by many accounts contributed his strongest theater score yet, and three young charmers share the title role of a plucky 11-year-old dancer from strike-ravaged Northern England. “Shrek” (December 14), meanwhile, features an odd hodgepodge of critics’…