Not to bash or start a fight, but I found Blanchette's Hela more interesting and more exciting than the JL trailers I've seen thus far. She doesn't need any special effects; she steals every scene she's in and you can tell that Blanchette has a great time making this movie.
Plus, shes Cate Blanchett and can act circles around just about everyone else. The trailers alone make her look more interesting than most of the MCU villains to date.