Man, waiting for the next part of clone saga is driving my nuts! I decided to do a poll in the meantime to encourage the regular readers to vote on the following question: what is Spider-Woman's real identiy? these were the choices i came up with.
A female clone of Peter: Bendis has said in interviews (that i don't know the links to) that he wanted to do something interesting with cloning. one of the facts he cited was that it is easier to make female clones.
Mary Jane Watson: What if there is more than one MJ? One could be the clone and one could be Spider-Woman. It would make for an interesting delemma for poor Peter, trying to choose between Spider-woman MJ and Goblin MJ.
Peter's long lost mother: I know this one is a long shot, but consider that she could have obtained a sample of the suit and faked her own death. i don't hold much for this scenario, but it's possible.
someone else entirely: Maybe this Spider-Woman doesn't really have anything to do with Peter's life. Maybe Ultimate Jessica Drew (that's 616 spider-woman isn't it) was taken in and exposed to the same process that made peter spider-man. Sometimes these comic writers hint that they are going in one direction, then they pull a 180 just to mess with us.
By the way, I don't think that the Spider-Woman will be Kitty. If Kitty will return to Peter's life, she will do it as Kittty. There are just too many complicated questions if she somehow becomes spider-woman. Still, if you think Spider-Woman is kKtty, then vote option 4