When does Untitled Siegfried & Roy series return?

Siegfried Fischbacher (June 13, 1939 – January 13, 2021) and Roy Horn (born Uwe Ludwig Horn; October 3, 1944 – May 8, 2020) were German-American entertainers who performed an animal-based magic show together as Siegfried & Roy. The duo were best known for their flamboyant, Liberace-style costumes and use of white lions and white tigers in their acts; Siegfried was the magician, Roy was the animal trainer. The pair met in 1959 while both were working on a cruise ship. They then began to perform together on ships and in European clubs and theaters. In 1967, they were invited to begin performing in Las Vegas.