Nick Jonas’ guest appearance on Tim Allen’s hit sitcom “Last Man Standing” could turn into a recurring theme. Jonas will be playing baby-daddy to Allen’s eldest daughter for the show’s Christmas episode. It’s a new direction for once squeaky-clean JoBro, who appears to be tackling a slew of more grown-up projects. Jonas was in town last month filming a guest gig on the new NBC show “Smash” and is preparing for a more permanent move to the city when he takes over the starring role in Broadway’s “How To Succeed in Business” on Jan. 24. Sources tell us Jonas has already found a Manhattan apartment and will officially switch coasts in mid-December.