I'm sorry, but I wouldn't want to see her in either role.
With Wonder Woman, I'd rather see someone a little bit older and stronger and someone that when I look at them, I see a leadership quality, which I don't think Megan Fox can pull off.
With Catwoman, I'd rather see someone a little younger than Christian Bale who is a natural athlete. I'd rather see a Catwoman like from the Batman: The Animated Series more than anything else, rather than someone who I feel would turn the character into something it's not, just like Hallie Berry.
I think someone like Megan Fox would hurt either franchise rather than help it. With the Batman franchise, I think they're heading in a very good direction and as much as I would rather pick up a Marvel comic over a DC comic, I'd rather much see a movie like "The Dark Knight" more than any Marvel movie.