Trouble with Catherine (and Monica Bellucci) is that the studio will want someone young - reason being that they want a franchise, and lets say they have 3 films out of it, that might be the best part of 10 years (one film every 3 years say).
Monica Bellucci would be past 50 by that point (believe it or not), and Zeta Jones would be 46/47, so that counts them both out... realistically they're going to want someone in their early to mid 20s. This is why Jim Cavaziel didn't get a shot at Superman - he's fine for the role now, but whether he'll look the part in 10 years is another matter.
Anyway, the thing is, I reckon Charisma will not get it in any case. She just doesn't 'look' right for the role, and she has too much baggage (Buffy, the Playboy shoot, etc).