The British actress, who plays Ellie in the post-apocalyptic drama, says the final decision rests with HBO.
The media tycoon has withdrawn his proposal, saying it is "not optimal" for shareholders at this time.
Claire Sweeney, who played Lindsay Corkhill, says the Liverpool-based soap was a "game-changer".
The British actor went missing 12 days ago during a hike in mountains near Los Angeles.
The pop star joins a growing group of artists who have cashed out on their catalogues.
Andrea Riseborough's surprise nod is one of several which left awards pundits astounded.
James Norton reflects on his role as criminal Tommy Lee Royce as the hit show nears it ending.
Filmmaker Guillermo del Toro has just received an Oscar nomination for his animated film Pinocchio.
Phase one involved stabilising the world-renowned building and evaluating what could be retained.
In November, Walliams admitted making "disrespectful comments" about two past contestants.