Rob Marshall is currently the top choice to direct Disney's live-action remake of 'The Little Mermaid'. 'The Little Mermaid' follows Princess Ariel - a mermaid who has an obsession with the human world above sea level - who, on one of her visits to the surface, falls in love with Prince Eric after she rescued him from drowning. Determined to be with her new love, Ariel makes a deal with the sea witch Ursula to become a human for three days but has to give up her voice for payment.