In total fairness, I think that "bad" is a loaded question (I loathe what I've read of Slott's stuff overall -- both in craftsmanship and in his interpretation of the Spidey mythos -- but other's like him, so he must've been doing something right for at least a part of the fanbase). However, Slott is known for doing extremely unorthodox things, including slaughtering sacred cows. So, with that in mind, I think it's possible, although everything I've heard seems to suggest that MJ is going to have some kind of role in upcoming runs, so I'm of the opinion that Slott won't do this (either because that's not the story he wanted to tell or his was told that such a story wasn't on the table).