According to the Telegraph, among other sources, Cate Blanchett is looking like more of a certainty for the role of Maid Marion opposite Russell in Nottingham. Once it was deemed that Sienna Miller would no longer be playing the part, it was rumored that Kate Winslet, along with Blanchett and Rachel Weisz, were being considered.
According to Mark Strong, who is also part of the cast:
"I think Cate Blanchett is set to take the Maid Marian part. She is a wonderful actress and it would make it a much classier film if she was in it."
Great news if it's true! Strong is right. She's a wonderful actress!