It's very far from guaranteed McAuliffe will be the nominee especially considering how pathetic he did last time.
I do agree with this. If he's the nominee, he'll be roundly trounced, and deservedly (though unfortunately) so, unless the Republican nominee is Cuccinelli or some equally kooky nominee unable to hide his kookiness (and even then I think McAuliffe would probably lose to Cuccinelli, unfortunately). However, McAuliffe is such a phenomenally uninspiring and bad campaigner that he's sure to draw some primary rivals who would be more electable. I wouldn't be surprised if Tom Perriello were the Democratic nominee, for example.