It has never been stated the the baby didn’t happen post-OMD. Everything supposedly happened the exact same, except that Peter and MJ weren’t married during the events. May could still be out there somewhere, unless she truly died. Also it’s strange Spencer showed Mayday when OMD showed that Annie was the child they wiped from existence. I really want to know Spencer’s original plan, he uses old pages of Spectacular that have Harry straight up refer to Peter as MJs husband while talking to her, I wish Pete and MJ remembered the deal