This may be a brand new crackpot theory. (At least I haven't seen it anywhere else.)
Is there any evidence to counter the idea that "Jackpot" is actually the unborn child of Mary Jane Watson-Parker and Peter Parker, stolen by Mephisto and rapid-aged the way that Illyana Rasputin was in Limbo, under Belasco's care? It seems like a pretty good swerve to me, and no one's put it out there yet.