Janis Joplin, Eliza Doolittle, Martin Luther King Jr. and a play that had to be bumped from the current season are the big attractions on Arena Stage’s schedule for the 2012-2013 season. And the lineup looks pretty enticing.

Just as it’s back-to-school time for area students, it’s back-to-the-boards time for the area’s theatre community. September brings with it a host of new productions to get you through the lingering heat. Arena Stage bids us Willkommen, Bienvenue and Welcome with their inaugural production of Cabaret (Sept. 8). The presidency of Lyndon B. Johnson was just crying for a Shakespearean take, at least according to American Century Theatre, who will stage Macbird! (Sept. 8). Two…