Not to mention that I highly doubt that Catwoman will appear in future Batman movies.
Batman's true love and his third best villain not being included in future movies? I very much doubt that. In fact, I'd be very surprised if she weren't in the next one.
I'm not a big fan of the Black Cat, and I don't think there's much substance to her character, nor do I think she's that interesting on her own. I think having her in Spider-man 4 in the capacity that people want would be too much like what happened with Gwen in Spider-man 3.
Even if he was, he was also opposed to using Gwen and Venom. Didn't stop it from happening.
...and it resulted in Spider-man 3. Raimi has already said Spider-man 4 is his project and he won't be pressured into doing anything he doesn't want. He has full creative control. I don't remember him ever saying he doesn't like Black Cat though, and I do remember rumours of her being in Spider-man 2.
I'm just not interested in her character, and I'd prefer to see others on screen first. I wouldn't know who to cast as her either, because I don't think she'd attract a high caliber actress. I know Spider-man fans don't like it, but I think most would view her as a Catwoman ripoff and I think people would be a bit hesitant to sign on to play her. If she were going to be in the movie, though, it would be very important not just to cast some hot, pouty girl as her. You'd need someone of substance and class, otherwise she'd just become a parody of herself.
I'm thinking Sarah Michelle Gellar. I know that people are scoffing because of what I said in the last paragraph, but I have an odd level of respect for SMG that I can't explain. I have always sort of wished she was cast as Rachel in Batman Begins instead of Katie Holmes. Feel free to rip me to shreds on this one, though.