Photo: Sundance Institute Andrew Stanton may be the most successful director at this year’s Sundance Film Festival. His three Pixar movies — Finding Nemo , WALL-E , and Finding Dory — haven’t just made billions of dollars; they represent some of the high points of that company. ( WALL-E is probably the best thing Pixar has ever done.) Yet he’s always seen himself as a live-action filmmaker. 2012’s John Carter was a notorious flop , but there are more good things in it than bad . Over the years,