I haven't read it in a while -- but is there anything in it that precludes Gwen being clone-Gwen or MJ being duped into believing the story (Mysterio/Mesmero/Green Goblin)?

+++++++

It would be easy enough to say that MJ was brainwashed to tell a BS story, and that the "children" are some sort of genetic constructs/androids/other.

The real problem is with Peter himself, because he stupidly accepted MJ's revelation by saying "it all makes sense now". Which it doesn't. So, was he brainwashed, too, maybe?

And if it could be revealed that Norman Osborn is dead, and the current guy is a clone/impostor/android...

<<I really think the attempt of "SINS PAST" was to make the readers forget about Gwen. Obviously it failed but she HAD been put on a pedestal and was too important to Peter's life.  Peter's story needs to be that he is Spider-Man because of Uncle Ben's death.  Gwen's story was getting almost as much attention as the origin.>>

As others said, I don't agree.  If you want them to forget about her, don't use her at all.  Wasn't Peter with her in House of M?  That's after JMS' story.
How much attention was Gwen getting before SINS PAST?  A story every 3 years where Peter mused about his relationship with her?  Spider-Man Blue I'll give you.  That a mini centering on the relationship, but usually it's a single issue. 

I don't think Gwen needed to be knocked off her pedestal, and certainly not by pissing all over the integrity of her character

Hey, maybe her mistakes there made her more realistic, but I'm not looking for realistic.  Men routinely have affairs on their wives.  Does anyone here want them to do a story where Peter has an affair on MJ because it's realistic?  I know I don't.   

Me neither, Larry.

And I agree - I don't think Gwen needed "knocking off her pedestal." Sure, she came up every now and then, as she should. Gwen is an important part of the Spider-Man mythos. But I never got the sense she was being overemphasized after her death.

Bottom line: JMS took a beloved character and did his best to ruin her.

I haven't read it in a while -- but is there anything in it that precludes Gwen being clone-Gwen or MJ being duped into believing the story (Mysterio/Mesmero/Green Goblin)?

******

I wrote this earlier.

my idea of undoing Sins Past is to say MJ had post hypnotic suggestions given to her while in labor, by the medical staff on Norman Osborne's payroll. The twins were created by good old Miles Warren as a fail safe to kill Peter.