I don't know about that. Unless there is sort of "Swiftboat Vets Against Hillary," the press will treat her with kid gloves and trip over themselves promoting her just like they did with Kerry this past election. And even if such a group were to come out against Hillary, I'm not sure what impact it would have, unfortunately--Kerry, unlike she, was an unknown quantity and I don't know if people would be surprised about anything they heard about her anymore.
She would see to it that NO ONE would get to ask her a tough question, in any forum, lest it expose the "brilliant" myth!