Creating and building a successful brand is difficult in any industry. Building and nurturing a successful wine brand in a region without an established regional identity or reputation is even harder. When Ami Opisso, general manager at Lieb Cellars in Mattituck, and the new ownership team took over what was then known as Lieb Family Cellars in 2013, they had an even more challenging situation. They had to revitalize a somewhat established brand and decide where they would take it, and the company, in the future.  They’ve pulled it off — perhaps better than any rebrand I can remember on…