Azog was killed by Nain. Beheaded in fact. His head was put on a stake outside the gates of Moria and his mouth was stuffed with a bag of coins.................how can he possibly be the main antagonist in film one?????????????
True, and yea i remembered i screwed that up after I posted
The simplist explanation is that, in Jackson's version, things probably turned out different. Azog is still Bolg's father and he still dies--but in film one by Thorin's hand.
Oh, and Azog killed Nain, not the other way around. Dain was the one who beheaded Azog in revenge.