None of them will. By the time 2016 rolls around, Christie will have the standard 5-8% of Democrats Republicans usually pull, maybe a little more. That's assuming he wins a primary.
Also, it's quite likely that, like McCain and Romney, he'll be forced to take a bunch of Hard Right positions to win the Republican nomination, which will turn off many of the Democrats he would have otherwise appealed to.
Unless something changes in the GOP Christie has reached a dead end. Maybe he can run for the Senate and live out the rest of his life there.