Originally Posted by
Raistlin
I agree, just look at the Joker from Dark Knight.
The thing about the Joker is that although he is certainly unpredictable, battit (no pun intended) insane, and will often kill people simply because he feels like it, he's also a pretty damn intelligent villain who usually has a plan going, even if said plan only makes sense to him. He's quite calculating and makes an excellent foil for Batman. Carnage doesn't really have even that in any depiction of him I've read. He just kills because he's crazy, and that's about it. There's not much more to him, and to be honest, he doesn't even play that well off of Spider-Man. There are just too many villains that have a much deeper and more meaningful connection to either Spider-Man or Peter Parker, and are more interesting for it and who are every bit as dangerous as Carnage.
I wouldn't even mind seeing Venom. The idea of someone who not only has Spider-Man's powers, but is actually stronger than him, can beat his Spidey sense and is out to kill him, but rather than simply taking him head on stalks him for weeks instead is pretty interesting. A lot more interesting than Carnage without a doubt. And really, if you were going to do Carnage right, I think anything less than an R rating would be pulling punches.