i read an interview with kirsten dunst where she was walking about introducing the black cat, but they cut those scenes out.
i don't know how much i'd nitpick a comic book movie =p you could ask why with super human agility and a spider sense he still manages to trip over himself on the sidewalk.
as for a venom/carnage movie i don't think that's gonna happen, at least anytime soon. because it'd suck. ok maybe it woouldn't, but highly likely it would suck. it'd just be a pure CGI fest, i keep thinking spawn as someone mentioned before.
besides, raimi's got enough to worry about. heh i don't know how he's gonna top this. freaking AWESOME movie. he's got his work cut out for him =/