Bruce Campbell had previously said that he was promised a major role in Spider-Man 4, but that he did not know anything about the character, other than it would be a meaty role. Sam Raimi had the following to say on the subject in a recent interview.
“I promised him we would write something because I really love putting him in the pictures. I promised him a good, meaty role.”
Unfortunately, that’s all the information available as Raimi says he doesn’t even know what the role will be.