"Spring Series" treats Milwaukee to choreographers with fans all over the country. In their much-anticipated returns, Matthew Neenan and Amy Seiwert will premier two new works tailored specifically to the strengths of the company dancers. Venezuelan choreographer Vincente Nebrada puts a twist on traditional dance in "Our Waltzes," featuring live piano accompaniment. One show. Two premieres. Together, it’s a triple billing of rising stars and an insider invitation to join the following.