Broadway director and choreographer Susan Stroman, whose many credits include the Tony Award-winning musicals Crazy for You, Contact, and The Producers, makes her Met debut with a lavish new staging of Lehár’s effervescent operetta The Merry Widow. Star soprano Renée Fleming adds a beguiling new character to her wide-ranging Met repertory as Hanna, the widowed Pontevedrian millionairess.