She would have been a great Gwen Stacey!

I think that if Sam Raimi chose to be closer to the comic book version of Spider-Man, Marley would have been perfect as Gwen Stacey! She totally looks the part of Gwen Stacey, plus she and Tobey Maguire had great chemistry in "Pleasantville!"
Also, if only they didn't say that Elizabeth Banks was "too old" to play Mary Jane Watson, Elizabeth would have been perfect in said role!