At the end of the day, Hillary's only legitimate argument is going to be that she can win the swing states that Obama can't, thus she is more electable, thus superdelegates should pick her ...
But here's the interesting thing: Let's suppose that superdelegates knew for a fact that Hillary would win in November -- and that Obama would lose in November.
They would then have to make a calcuation: "Should we think long-term of short-term?"
Obviously, any perception that the insiders "stole" the election from Obama would have a long-term negative impact for the party.
Thus, Hillary may face superdelegates who have decided it's better to lose with Obama than win with Clinton.
How do you beat that?