Christie won't be the nominee, I think he'll have created too much animosity with the Republican establishment.
That, and his turn to the right within the next four years in preparation for his bid for the GOP nod will be regarded with much the same skepticism that greeted Mitt Romney -from everyone. And I doubt he will fare much better in defining his own identity if he did win the nomination. Christie will undoubtably face a crowded and more daunting field than his predecessor did, and he will not be in a position to fight back effectively when Democrats begin to attack him.