The trailer of the upcoming Chris Hemsworth starrer superhero film 'Thor: Ragnarok' has been released. The Marvel film also stars Tom Hiddleston as 'Loki', Mark Ruffalo as the 'Hulk' and actress Cate Blanchett as the character 'Hela', the Goddess of Death. Directed by Taika Waititi, it is scheduled to release on November 3.