After a New York Run, an Unusual <cite>Next</cite> Step, by Peter Marks
<em>Do-over!</em> The producers, composers and actors of <cite>Next to Normal</cite> are shouting it, in the cause of this musical tale of a suburban mom's total mental collapse. And if they do manage to find success in the unorthodox effort to give it a Washington retooling—after it was already unveiled and reviewed in New York—then an intriguing new model might be in the offing for how an American music…