In the first Thor: Regnarok movie trailer, Thor fans were given their first real insight into a very different movie for the Thor franchise, thanks to director Taika Waititi. Thor: Ragnarok's trailer was the Gladiator version of Mark Ruffalo's Hulk. Coming in a close second was the debut of Cate Blachett's new character, Hela, the main villian of the film. It's speculated that Hela will play a bigger role in the Marvel Cinematic Universe.