Broadway’s new season is about to open. “Unlike in previous years, there’s no potential blockbuster in the wings, no “Hairspray,” “Wicked” or “The Producers” that has the town buzzing with anticipation and hope. One could say that so far it appears it may be a rather ho-hum season, but it’s still early, and over the next few months some shows will drop off, some will be deferred and, more important, others will emerge and be added to the menu.”