‘Avatar’ producer Jon Landau is listing his Key Largo home for just under $14 million.Courtesy: SPACECRAFTING Legendary producer, Jon Landau, whose list of iconic films includes “Titanic,” “Avatar,” “Honey, I Shrunk the Kids” and “Dick Tracy,” to name a few, is selling his sprawling Florida compound.  The 6,050-square-foot house was built in 2001 and is