For some unfathomable reason, James Cameron is a filmmaker who many have seemingly underestimated for practically his entire career. No one thought he could match the thrilling fun of The Terminator, and yet Terminator 2: Judgment Day proved to be one of the greatest sequels ever made. Titanic was destined by the media to be a spectacular box office flop, and yet it went on to earn more than $1.8 billion and win 11 Academy Awards including Best Picture. And then there was 2009's Avatar; another film preordained to presumably...