Twenty years after helping make Kate Winslet an international star with Titanic, James Cameron is cashing in his favor. According to Deadline, the director has talked Winslet into joining his Avatar sequels, which he just started production on last week. The Academy Award-winning actress, surely one of the top dramatic talents of her generation, will play “Ronal,” surely one of those cerulean lanky-cats that ride around on dragons. Hey, maybe Leo could play one of those!