Okay, it was called OMIT, or One Moment In Time, and it's written by Joe Quesada. Well, the leaks, complete with a poster, got out. To commemorate the 100th Spider-Man issue since Brand New Day, where Peter Parker and Mary Jane never married, this story will be told, featuring Mary Jane in her wedding dress standing next to a Spidey with a motif tux.
Any of you hopeless romantics hoping this means BND is over and Peter and MJ will be together again, forget it. They are tying this with the 100th issue of Spidey since BND, and Quesada has not changed his mind about Peter being single (he's probably still pissed Spider-Girl won't just go away). Current speculation is that it will tell why (in the current continuity) they never got married, what the reason is. I thought the reason is the editor didn't like a married Spider-Man. Seems to explain everything to me.
Does anyone really care? I mean, everyone, even those following BND, admit that major changes are just editorial stunts. If things can change regardless of progression and structure, just because the editor wants it, why get worked up over the fates of the characters? This will be another piece of trivia, and then it's onwards.
Peter Parker is intended to be a forgettable loser. But that's in the stories. BND is making the readers regard him that way, too.