I talked about the Catwoman rumors a few weeks ago and how Rachel Weisz was on top of that list. She would be good, but I hope Angelina Jolie is not considered. She may cheapen the appeal of the next Bat chapter. However, if they do go the Cat route, I think they should use the Catwoman year one version.
Selena (Catwoman) was from the streets. A petty thief/prostitute-like person who wanted more in the world of crime. I think this version would give her some meat as a character. The actress that plays her should carry the look and style of the Catwoman most of us know and love.
So here are some actresses, I think, could pull it off.
Olga Kurylenko- from Quantum of Solace
Morena Baccarin- from Firefly