The undoing of the marriage is not what upset me. What upset me is how Marvel keeps doing things in an unnecessarily complicated way in the name of trying to shock and surprise the readers. To begin with, they should never had let Spidey let his identity be officially known in Civil War; that way they could have skipped the entire, and IMO completely meaningless, plotline of Back in Black and OMD and they would have Spidey as he is now; an unregistrated hero with his secret identity still intact. As for the marriage... I wouldn't have had any problems with Peter and M.J. simply divorce if it is so damn important to have Peter single. Instead they had to complicate things with this OMD-crap, so now you have a situation with a lot of new questions: Why didn't they get married? How come that Harry Osborn is alive? And I have a feeling that when they start answering these questions all you get is more boring plots, more "shocks" and "surprises".