Well, let's start out with his current ongoings:
-He's the ongoing writer of Marvel Comics' Amazing Spider-Man
-Has his own comic label, Joe's Comics
-Works here and there on TV projects, nothing major or solid right now
I'd have to say that there is a definite possibility that he would come back. He's a freelancer, for both Marvel and Top Cow, so he can work basically anywhere he wants. So the question is, "Does he want to work on Ghostbusters again?"
What do you guys think?