Maybe I'm crazy, but I think PBS televised a production of Seven Deadly Sins in 1961.
As for Lenya, she was a strange presence, but she rasped and the translation in English never came across. Best to leave it in German. Anne Sophie von Otter recorded it several years ago. Get a copy. You'll be very surprised and delighted. And Gisela Litz's rendition is also worth the price of purchase.
And speaking of the revivals that will never happen:
Massin'e Boutique Fantasque with Bouder and Millepied (did I spell it correctly) as the can-can dolls. The applause would never abate. Believe it or ot, the early Jerome Robbins ballets were direct descendants of Massine. They relied, not so much on technique, but on great personalities who could express characterization through dance. Think of Janet Reed, Harold Lang, Sondra Lee, John Kriza, Muriel Bentley and Jerome Robbins himself. As well as other really fantastic dancers such as Tallchief, Le Clercq, Mounsey, etc.
Revivals that should have happened in NYC
Kyra Nichols in Ashton's Ondine and as the Miller's wife in Tricorne. Massine was in a class by himself. Too bad most of you never saw him. He's trashed today, but doesn't deserve it. His ballets are better than you think. The just need PERSONALITY.