Of course Mary Jane's not appeared! Why would she? It's not like the loss of her daughter might have an impact on her in any way. And I'm sure she'd be just peachy keen with letting the people who are the reason her daughter hasn't come back just hang out in her home.
What, is Anya going to start wearing Mayday's clothes next? She's practically interchangeable with May at this point. If she's going to be in Mayday's house, interacting with Mayday's family, WHY WAS MAYDAY THE ONE THEY GOT RID OF?!
What do you reckon from what the letters pages indicate? They say the title will be tying in to Dead No More, the next big event from Dan Slott focusing on returning dead characters to the land of the living...possible return of MC2 Peter?