Hillary, as 2012 standard bearer after an Obama resignation, would necesarily have to choose a high profile African-American and push aside Biden. It is almost a given. That specific ethnic community in large part would be LIVID and EMOTIONAL if Obama lost his crown, even if all the evidence clearly showed his constitutional ineligibility beyond a shadow of a doubt. To lots of people, (the truth, the law, incontrovertible evidence smacking you right in the face), well, that means absolutely next to nothing compared to agenda. Some high profile American legal cases in the last 10 years verify that.
Not. Gonna. Happen.
The only people seriously worried about a Hillary run for the White House, are paranoid Republicans. You never hear a single Democrat talking about this. Not even in jest, or in speculation.
She's off their radar, and happy to be off. Watch and listen. The signals she's been giving are unmistakeable. Dems see it. I don't know why some Republicans can't. Personally, I think fear is clouding some folks' higher reasoning abilities.
Do yourself a favor, and look for blog posts that support your theory. You'll find very few Democrats and lefties even pondering a Hillary run. They're done with her, and she's done with the game. Seems that only Republicans are slow to catch up to what they all know.