Obama has now won 8 in a row and is very likely to win both contests next week. And he's not only winning, he's winning all of these contests in landslides. He's obviously the front-runner at this point. I think it will take some sort of major surprise to get Clinton back in front.
But can he hold onto the lead, politics is a strange business, with many twists and turns So maybe Clinton has a Major Surprise in store That your comments said she needed
I think if Clinton had a "major surprise" up her sleeve to pull on Obama (some sort of skeleton in the closet sort of deal) she would have pulled it out by now.
The Clintons are much smarter operatives than that. They will wait until the convention if necessary, to sway any unbound and super delegates. You don't want to give your opponent (Team Obama in this case) the opportunity to respond or be prepared. Attacking just prior to the Convention is the way to do this.