Speaking with Empire at Comic-Con, Sam Raimi told of his feelings towards continuing with the franchise, and revealed that they are actively looking for a writer for the fourth film.
Here is what Raimi said:
“I want to help contribute to the production,” he said. “I don’t know if I’ll just be a producer on it but if I can work with the writer in such a way so that directing would be right for me, I don’t know. We’ve had our first meeting on Spider-Man 4 and we’re looking for the writer.”
For the rest of the interview, check out this page and their video diary section here.
Source: Empire