At this point, I think that the likes of Cruz have a better chance than Christie. (I'm not saying that Cruz has an especially high chance of winning, just that Christie's chances have collapsed completely).
1.) He is least liked candidate. He's even worse off than Cruz.
2.) Between Bush and Romney, there isn't room for him either in the electorate or in fundraising.
3.) He lacks discipline, he's likely make gaffes.
This is good analysis. 1 year ago I thought for sure Christie would be the nominee, even after the Bridge -episode, but he's done little to repair his reputation and his perception as a bully is going to hurt him, I think, especially in places like Iowa and New Hampshire. I think he'll be this cycles Rudy Giuliani. Overhyped and early fizzle. A field with Mitt Romney and Jeb Bush will suck up all the establishment/moderate money and influence.
